Crow build

The focus here is to get enough gun items/healing items to win lane, then going for Rapid Recharge (RR). Movespeed items to allow for boxing is also helpful.

Whatever helps you to survive

You want to be fast to get to lots of team fights where you can support with crow.

Situational depending on what the enemy has. Suppressor has been feeling necessary to keep gun enemies in check.

Fortitude + 1 of these items should be all you need, but some games need more.

Spirit Burn will procc so long as enemies have decent HP. Otherwise Escalating will always stack nicely and gives generic spirit damage.

These are items that can be applied safely at range to offer increased utility through even more resist shred, antiheal, or damage reduction on enemies.

Boundless and Overflow give generic damage increases to your abilities and increases crow duration. All the cooldown reduction on crow means you can have 100% uptime on spellslinger and mercurial magnum. You still probably won't do as much damage as the enemies carries though, this build is primarly for supporting from the backline with crows.