Ability Cycling - Instead of when you hold LMENU to see a roulette of abilities, you can have an ability toggle. You press LMENU (or whatever it is bound to) once, and on the far right, a scroll bar of abilities you possess show up. If you press LMENU again it'll disappear, keep in mind you can keep playing with it enabled. When it is enabled though it should disable the hotbar scroller and only allow the ability scroller to move.
By pressing the cycle key "Z" or "V" you can change which abilities show up, making it easier to find specific abilities from different elements or sub-elements. When you found the move you want to use and it's selected, all you need to do is press a new control key called "Ability Activation" by default set to "G" and it'll activate the ability.

Note: When I say a "scroller", it's like a bar that goes down and up, and what you see is the icon for each ability, "Z" and "V" will change abilities shown in this scroller to whichever element is selected. Obviously as the developers, if you accept this proposal, you can modify specific bits to make it even better.

Of course keeping custom keybinds will be a given, this is just in case users don't want to keybind their abilities and would prefer to fight with this scroller. Both options for all players :)

It's okay if this idea get's rejected, just thought it'd be a cool new interesting idea for how abilities in a mod could work. Loving what I am seeing so far, good work :)
If you see this, I'd love to hear your thoughts. I know it won't be an easy willy nilly job to do, it'll probably be done in a future rewrite of the mod if you accept. If you struggle to understand some of the things I'm saying, just specify the problem and I'll try to explain a bit better in a reply.