perfectly straight on a twistlock gama or owner weighted hook
ill use a 4/0 for 3.8" and a 5/0 for 4.3" size.
I used to twist the lure all the down so the nose was on the eye and then i would pull the tail tight and then drive the hook threw verticle. I feel that the lure must lay with slackness to it. Not so its bent in a u shape but not pulled taut either. If the area where the hook goes threw has tension on the plastic its more likely to tear. Ive caught pike and bass on the same lure, when it used to rip with one or two fish. For me, I get skunked sometimes and the kietech will always get bit. The majority of this year ive been trying new techniques like swimbaits, glidebaits and bigger profiles but i always know if i pick up that kietech it will get bit. Its just no longer the most fun way to catch em.
Good luck to you all this season