Which build do you think would work better?
or...
Basically, Do you think she should be built with mostly Attack Speed, or more of a mix with Attack Damage?
More Specifically, What about Bloodthirtser Vs. BotRK?
ALSO: Found a post that shows That AS over 2 actually slows Kalista's Attack Speed while using Runaan's, so take that into account Here it is
Coming back to this thread to post my findings.
Played a couple games today, went normal build with Runaans BotRK Berserkers both games, but one game I dropped the attack speed quints for flat AD to make sure I didn't go over the threshold. The difference in damage output at level 18 is completely unnoticeable, especially since Kalista naturally attacks slower than her auto speed if she is using her passive.
All in all I'd consider it a wash. No reason to worry about lost attacks from standard build because in any realistic situation you're going to be using your passive so much that it's not important. It's not worth going for builds that aren't berserker grieves because you don't break 2 attacks per second until level 18, and the grieves give a very important early game power spike. BotRK is very important as well for the life steal and active.
Bt vs BotRK. I vote botrk. Kalista's profit's more of the E staks and the high attk.sp gonna put the passive in good use + kalista range and the botrk are similar so you can use the active. (Sorry if bad grammar, small phone is small.)
Generally I either go double lifesteal (BT + BotRK) with runaans or I go IE PD without Runaans. I don't think IE synergizes very well with Runaans personally.
The first build is more likely for vayne if you remove .
Second build is for kalista.
i prefer this: 
So in this case, only the 1st build is effective. You made an error in the second build building and together when you don't have any other crit chance items. Keep in mind that only gives 20% crit chance. That means that your build is very ineffective for building such an expensive item only to get few crits off if you're lucky.
So here are 2 builds i highly recommend as a diamond kallista main:
Build #1:
So with this build, you get the highest snowball potential off because you're obviously stacking mutiple rends in teamfights and this build focuses on maximizing your sustain and dmg per autoattack (meaning the dmg you deal from your autoattack + hurricane bolts). Note: you swap with if you feel like you need more early game "self-peel". This is the more standard kallista build.
Build #2 ( OR )
Now this build improves the functionality of infinity edge because you're building an attack speed item that gives extra crit chance. Sure, your autoattacks are only single target dmg now but your single target dmg is heavily increased with the 250% crit strike dmg mutiplier. Again, you may swap out bloodthirster for botrk if you feel like you need self-peel or are expecting alot of late game hp tanks.
In the end, I prefer the first build because it provides a very big power spike when kallista gets hurricane. I'd recommend this build if you're snowballing since this build can easily fall off in terms of dmg. The 2nd build is much more expensive however it secures your dps and provides better late game scaling because of the crits.
BT rush is pretty strong, I like the second build but I'd swap IE for botrk since runaan's doesn't give any extra crit chance, and double lifesteal is super valuable in the tank meta.
I've even started going BT and botrk on other ADC's now.
