Just to clarify something about Eye for an Eye, that is not made completely clear.

Eye for an Eye is, as its name describes, a punishment ability. Mobs that attack that target with physical skills, have a 10% chance to be inflicted with a debuff that reduces their damage dealt by 10%. In many cases, Eye for an Eye might not proc on a single target boss. The skill works best with an AoE pull. Unless the mob gets the debuff, the skill adds absolutely zero survivability.

Deployment Tactics is great for when your OT and MT have to tank at the same time, such as the split hands phase in a3 or during the multiple add phases of a5.

In roulette content, it's sometimes handy if your tank has lost a few mobs in a pull. Adlo+E4E+Deployment.
Your fairy can also be used to spread the skill in solo content, or when people aren't optimally aligned for the spread.