One thing to look out for: I can't currently open the file that contains Critical Echo. Though it seems to work fine when I tested the port. So if the skill behaves weirdly please let me know

I'm having a problem where when I play a multiplayer match with my friends the skills disappear and are replaced by other ones (very random skills ive never seen before), and the moment I leave and my friend checks the Tank class skills are back. Any idea whats causing this?

I have no idea about that one. But I do know that having different versions of the same mod installed can cause weird things to happen such as that. The only thing I can suggest is reinstalling your mods (as it can be either of you causing the problem, both of you should do that then)

Mod is great, some things i noticed was Feedback sometimes doesent do anything but just sets off some tornado, and gain doesent seem to increase resonace at all.

Gain is not meant to increase resonance, it uses it to increase constitution. You may be thinking of amplify, but it worked as intended as I tested it. Bear in mind that amplify won't give you any resonance if you don't have any as you use it.

Feedback also worked as intended from my test. Did you perhabs use a shield from another mod? Any other details you think could cause your issue?

I'm having an issue where when I'm playing the class solo the enemies are skipping their turns and choosing to not attack me.

Heya, there seems to be a mishap where I use Implode and give myself status effects originating from my weapon. Don't know if this is a bug or intentional. Either way, it's a bother.

So I activated the mod after starting a campaign and the tank trainer is nowhere to be found?