Wow you are really ugh... wrong.
First the purple jungle item is worthless on Kindred like LOL... you don't need the aoe smite lmao just for that I should've ignored and downvoted you.
Second, you don't take warrior for the ad (even tho ad is ad) you take it for the cdr and the armor pen. Your passive deals physical damage your e is physical your q is physical your w is physical. No one cares about a shitty non sated devourer. hell even a sated devourer is so worthless because if you are actually good at the game, you'd have enough gear to kill any target in 3 hits or 4 => making the devourer USELESS. Except maybe tanks, but they'll die so fast anyway so who cares.
basically buying devourer is the most dumb thing ever you can do on kindred.
Edit : and yeah attack speed is nice, warrior, bortk, berzerk, trinity and from then you can go anything you want. You can even go BT + IE and just lol at those -60% health first hit. "but bruh devourer".