I just made the ingenuity of humans codex to use vulnerability when I range or melee. But everytime I use ingenuity and want to use vulnerability my character does a basic ability and then uses vuln after it so the vuln does not get the 100% hit chance. Is this intentional because i thought this would be the main reason why people would make/buy ingenuity?
Ingenuity should not affect auto attacks... this should be fixed.
I am guessing you are using dual wield, since dual wield gets 6x as many auto attacks as 2h and they are just getting in the way.
If you want a temporary fix, I would switch to a 2h weapon, and use ingenuity right after the 2h procs an auto attack. This might help you work around the auto attacks stealing the accuracy bump. It's not the best, but if it makes you able to use vuln, it should be better than not getting any vuln.
I tried a 2H weapon but the game just won't let me do vuln when i activate the ingenuity ability is it maybe intentionally that i can't vuln right after ingenuity? and it doesn't proc with autoattacks my character just uses a random ability before using vuln.