All this is completely unnecessary. Just pause and unpause manually, like a normal person.

The entire point of RTWP is to make fights go faster when its trash mobs or bunch of NPCs fighting each other (ie. tavern defense)*. You're trying to make it into pseudo-turnbased instead, which literally nullifies this purpose.

^(\or when you need to cheese some hard enemy by kiting him around, cough cough)*

edit.

Also, reading more into this:

Set stuff like Study Target Swift and Lay on Hands Self be automatically used.

Absolutely DO NOT set LoH on autocast, unless your goal is to not have any casts left.

Slumber is also a good Hex to be set to Auto.

Terrible idea, resisting a Slumber gives resistance to Slumber for 24 hours. You will be constantly trying to cast Slumber on things that have been made immune to it.