Who says you have to control the descender? Just make them a Bishop and switch to someone else.
In RM2, Bishop was the game's best support unit, being the only character to have both Field Barrier and Aggregate Sharp. Top it off with Nurse, Raise Dead, and some attack spells and you have a hell of a unit.
http://terosclassicgaming.blogspot.com/ - Watch me beat classic games! Last game uploaded - PSX Choro Q2