Activating any sigil fires an 100% ability damage attack (if you are in attacking range of your target), in the case of ingenuity, the accuracy bonus is taken by this attack. This is the reason people can't ingen 4t vuln anymore since activating the sigil is treated as an ability, so it triggers your auto attack cooldown like any other ability would (aswell as actually stealing the hit chance bonus).
Using mutated barge with mobile perk equipped puts barge on a 20s cooldown instead of 10s and also gives no adrenaline. Surge and Escape seem to work fine, haven't tried unmutated barge. MBarge without mobile perk also seems to work fine
Just for the sake of it here's a way to actually 4t vuln with melee with the current issues
Thank you :)
I've sent this over!