this is a build meant to burst anything and everything while keeping you alive as much as possible. you spam q and e later in the game and because of the bloodthirster and you're passive mixed with q, you heal a lot and can stay alive. But still, be careful because you do not have a lot of health. Hurricane bolts also work with your e. In a team fight, you can put your e onto another enemy and just let the bolts and e kill them while you focus on another target. even if you mess up and your e doesn't kill them or leave them really close to its on like a 3 to 4-second cooldown when you are almost or full build. this build burst nontanks and tanks also easy to deal with because of the Kraken slayer and e combined with w. The main thing is to be careful of cc because you can die fast if you get caught out in a bad spot. The main worry with cc is point a click since your q should allow you to dodge most of the skill shots in the game.

So for the items the optimal build, in this case, would be Kraken>hurracane>quickblades
those are the core of this build. you take Kraken first for the damage and boost to other items. Hurricane second because of its passive and attack speed buff. Quickblades is the third item because for its passive to work it has to be the hits have to be critical strikes. you can take this as your second item but will suffer from a lack of auto-attack speed and you will only have a 40 percent chance of it working. but when you get it as a third item you have a 60 percent change for it to work as well as having a good auto speed at this point in the game. after this, you take infinity edge and bloodthirster. The order of these two items is interchangeable. If you want more damage you take infinity first but if you want survivability you take blood first. As for boots to take berserker for the attack speed, try and get this as soon as you can.

In this section, I will explain some of the changes you might want to make to this build in a specific scenario.
Immortal shield bow:
you might want to take this item if you see a lot of people that can just one-shot you. and you feel like you will need it throughout the game. If they have a lot of champions like that I also recommend taking red smite instead of blue because it gives you 20 incoming damage reduction from the character that you smite.
Mortal reminder:
this is if they have a lot of healing this also gives you some more move speed if you want that, but if you want the movement speed there are better options out there.
Lord Dominik's Regards:
this is an item to kill people with a lot of armor. this will make tanks die even faster, even tho with Kraken they already melt. but if you are struggling to get damage through don't hesitate to build this item.
Phantom Dancer:
gives you a lot of mobility in order to move around team fights, kite or just be fast.
rapid-fire:
you take this if you want some more range from time to time as well as a little more mobility.
the collector:
take this for extra burst and an execution. good if you feel like you are barely not killing people. or if they have ways to save themself.
stormrazor:
take this if you want some more auto-attack speed as well as a slow.
All items that have the energized passive fit well with kindred and are relatively easy to rock because of your q and how much you move.