I’m not sure how much of a concern this is for PVE or PVP play so this post is only focusing on Bounty.
I think Fischers Wetwork skill needs to be capped at a certain amount of charges. The last bounty, I noticed there were periods of time when my heroes were doing absolutely no damage to Fischer.
When looking at his submerge skill, it can trigger every 4 seconds and lasts for 5 seconds. Wetwork activates each time submerge does and triggers 15% evasion. So technically it’s possible that Fischer could have 100% evasion after 7 triggers which makes him invincible. Considering bounties take a lot of shots at them, I’d suggest Wetwork gets capped at 5 to ensure that it doesn’t become impossible to kill Fischer who is already one of the more frustrating bounties to hunt anyway.