Troll/half gold dragon help

[dreamquixotic]

I am making a troll that is half gold dragon and am looking for good prc or class to make it OP. I has looking at spellfire channeler because of the huge energy storage from the con bonus but there is the issue that at the elevels the spellfire channeler class is not on par with some of the things that we will be dealing with being that it is all epic.

Any advice