Clarity Potions are taken for a simple reason, your game play is based on casting lots of spells even early game for either a kill or save. And you lack mana so this really does help.

Tangos and Salve are for regeneration purposes, even if you have heal there are times you'd rather save mana for that emergency heal and times your really don't have mana.

Ward/Chicken are yours to take because you are the support, but please don't take both you aren't a ranged support so you have to spend it on other things.

GG Branch and Circlet are there for two things, one is damage for last hitting/denying and two for more int which means some more mana.

Scroll of Town Portal is always a necessity. You have to be where the action is to save that ally or chase that enemy down.

Treads is important, it gives you mana when you need it, it gives you HP to last longer in clashes and improves your movement speed. Why treads over phase? You play Omni as a support more than a chaser so this will suffice.

Soul Ring is the newly added item which IMO is Godly with Omniknight. You can cast more spells in clashes. You have a free 150 mana to cast Purification to clear waves. And this is definitely core since you can regain that HP loss in no time.

Wards and Dust is common amongst supports and your no different.
But you can't kill wards that you counter-ward so bring a ranged friend along to counter-ward.

____So three lanes to choose from. Short, Mid and Long lanes. You do better at the side lanes where you can build up your Soul Ring easily and where you can baby sit one of the carries.

For a more in depth look to which lane to take lets justify each lane. First mid lane, in my honest opinion Omniknight should never solo mid, never solo at all for that matter. He doesn't make good use of bottle, he lacks lane control compare to real solo's and he needs to build Soul Ring ASAP. The only time you would consider mid is if your carry takes mid and you have to babysit him there.

Next we look at the side lanes. We have two options the short lane(Top for Sentinel and bottom for Scourge). Side lanes are good except you don't have the advantage of a closer tower protection and you are more susceptible to ganks and lack a pull spot. But nevertheless you are still capable of baby sitting here, but you will have a hard time at it if the enemy keeps pulling. The short lane is an acceptable choice, you can build Soul Ring from the side shop and babysit with not too much difficulty.

Lastly we look at the complete opposite of the short lane. The long lane, which also has a side shop. Greatest advantage of the long lane is the pull spot and that tower protection. Disadvantage is usually this is where the enemy ganks more often. But compared to the short lane you'll have an easier time here. This lane is the more preferred lane of choice.

Both side lanes are acceptable though although the long lane is more preferred over the other. Main reason for picking these lanes are the side shops and ease of baby sitting.

____Once you've chosen a sidelane here are your priorities whilst in the said lane:

Purification: Ok it's simple you will always heal your ally before yourself. Don't worry too much about yourself because after all you are baby sitting and you have tangos and/or a salve. The only time you consider healing yourself is if your about to die or you already have SR or a mana regen item.

Repel: This requires good decision making. Whenever your carry/semi-carry tries to take a creep always observe if the enemy is about to disable. If they do immediately cast repel on the enemy's target, either you or most likely the carry.

Purification or Repel: So there will be situations where you ally or you have sustained enough damage from physical harassment and the enemy is about to launch a full scale skill fiesta. So the first to your should consider is does your carry/yourself sustained more than 50% HP loss? If yes then purification first, then repel afterward. If no then cast repel and maybe you and your lane mate can harass the enemy back.

Getting Ganked:First of all this is the easiest scenario, IMO, to tackle. When they are about to gank they will always charge in or try to bait you and your lane mate. Safest thing to do is cast repel on yourself and scout the jungle before charging. Or you can just lay back and let the carry/semi-carry last hit creeps and wait for them to gank your lane mate. Once they being just cast Repel and problem solved. Repel removes most disable when you cast after the disable has taken effect.

Mana Constraints: There are situations where you can only cast either purification or repel in this case only cast repel I would usually cast repel and retreat to the safety of fog and tower. The only time I recommend casting purification is only when death is achievable by physical dps.

Harassing or Lane Control: Ok this is one of the problems of why Omniknight is such a rare pick as a baby sitter. He doesn't have much lane control, and he doesn't usually have enough mana to lane harass and protect at the same time. Another flaw in his lane control is that his one and only nuke is lethal only at melee range. So when against a melee hero it pretty simple, whenever they try to last hit a creep anticipate, observe and time your purification on that creep, the said hero will take damage and fail to take the last hit. Against range heroes its harder and you pretty much have to stick to denying and protecting your carry. With spell casters its the same with ranged heroes except you can repel yourself and attack them in melee range, but be cautious as you might die since you can't heal yourself.



Dual Stunners & Tri-lanes: I will not lie to you about a lane with dual stunners and tri-lanes. These lanes are risky and dangerous to both you and your lane mate. In this type of lane your position is key to safety. You should refrain from being in the front lines, as much as possible stay in fog but within range of experience from dying creeps. Whenever they attempt to kill you or your ally cast repel and back. If you think you guys can get a kill while your ally is repelled go for it. But always remember safety before netting kills. Key here is position always remember that, when to use purification and repel is mention above.

This is where the Omniknight truly shines. So before a clash ever commences make it a habbit you cast Repel on your teams carry/initiator and always use SR before casting a skill to conserve mana.

Once a clash has been initiated begin to purify your damaged or dying allies. Don't ever wait for moments where you can damage an enemy at the same time. Heal as soon as possible but be wise on who to heal.

Whenever Repel's cd is over cast it back on your teams carry or a hero with a strong channeling spell(i.e. Rylai, Voljin).

Now about Guardian Angel. Before casting always be at the center of the team so that all or most of the team receives the buff. Now when to cast should be when the enemy carry has shown himself, and when most of the super nukes have already been dropped. Don't randomly cast it.

Degen Aura requires you to be in harms way so what I suggest is wait until most of the enemy is already down and retreating before going in and proceed to chasing and slowing.

Basically stay out of harms way and keep casting those spells.