Stealing an idea for Disgaea here, but what if enspell instead of doing add magic damage instacasted a T1 nuke of the element with every sword swing. It would be a constant MP drain but the dps increase would be pretty sizable with the right hybrid set.

An example:
Duzell hits the crawler for 100 damage
Duzell's enflare casts fire, dealing 300 damage.

Even if it was first hand main hit (you would probably run out of MP way to fast otherwise), that is a vast increase in dps since rdm would do a majority of its damage in TP phase, not in WSs.