Invoker

you can skill an "ability (quas, wex, exort) 8 times
because that appears to be the max amount the UI can
handle

this means we need something to skill between level
24 and level 50. There are no skill slots! Gimminy
Jillickers.

Furthermore this goes in the face of what Invoker
represents: unlimited learning and spellcasting
potential but insanely difficult to master.

Solution: Ok stay with me guys. Imagine for a second
that invoker has 6, not 3, but 6 "invocations" (i.e.
Q,W,E,R,T,&Y). Yes, yes. He doesn't have room in the
UI for that, right? Of course not!

So how do we do it? I'll tell you how. "Ghost Walk"
can function as a "Stance change". While he's in
"Ghost walk" form his spells switch from QWE to RTY.

All of a sudden you have a VERY INTERESTING HERO!