No...
Multi headed lumi?
I don't know if you realise but rogues sneak around and do sneak attack damage. You can do this better.
What would DFA be like? You a get a breath weapon for each head AND extra con from the template. Amazing. That deals your damage, your other side you deal with trapfinding and hiding, if thats what you want.
DFA 15 //10RHD-LA/5 XXX would be fun, something I want to try, you don't rly care about HP as the only thing that can kill you is disintegrate (DFA gives you good fort and will the 2 best and the 2 that actually affect you meaningfuly)
I won't go into spell casting as you'd win too much.
D-End