This build revolves around Kalista's ability to infinitely stack Rend on multiple targets. Your entire gameplan is to constantly nuke the entire enemy team with 1000+ damage Rends. Your dueling potential is not as potent due to the lack of Crit, but Hurricane makes up for it with its synergy with Rend and increasing your teamfight DPS. The saturation of armor pen in this build is to maximise the effectiveness of BORK's passive. And since the Hurricane bolts also proc on-hit effects, you will be dealing 8% hp damage, shredding armor, and slowing three people at a time. The nature of Kalista's passive means that you will be jumping around and thus the hurricane bolts will be constantly changing targets, giving you more targets to Rend.

When to Rend in team fights:

• When a marked target is within execution range
• When a critical target is trying to escape
• When a stray Hurricane bolt has hit a minion and is within execution range.

DO NOT Rend whenever you can. You cannot apply rend stacks when it is on cooldown, so your damage potential will be greatly lessened during that period. So unless its absolutely necessary, Rend sparingly.