Archetype and Class ressources

I don't believe that Archetypes should use anything other than MP.

They can call it whatever thematic thing they prefer, but no, just one, thank you.

The game's balance is better served in my opinion with just one flat thing, if everyone is going to be wearing the same gear. Crafting is also much better, resale of crafted gear is optimized.

I'd definitely go with a purely MP-based system. Give all archs some way to "burn" mana of the opponent and give 2 archs the means to restore it for others (not themselves, outside of regen buffs).

Imo that would add way more fun pvp content and would be way easier to balance and control. If you have resources that would require you to get hit or hit your target (iirc wow rage worked like that), the pvp would just become a Benny Hill simulator with a few CCs in-between running. Yes, you'd have some way to get that resource through your own means, but those means would have to me quite limited as to avoid the overall system becoming useless.