I would make it so RDM has 2 phases.

The normal one: like now. Balance white and black for a melee + ver finisher.

New one: the ver-finisher gives you a buff. Verholy a White Buff and verflare a black buff. This buff gives +dmg to the same color of the finisher. Then you have to reach 100 magic points of that Color to unleash a super strong elemental melee attack. Then back to normal rotation.

Would love a "balance and unbalace" gameplay :3