I've been working on gearing my Maul. My arena team is my top 5 by power because that's who I gave most attention to, but Maul is #6. I currently run: Palps lead, G10 Vader, max gear JKA, max ge...
With that team you are not number one; so it would not hurt to try him out for a few days.
I run maul but he is really only viable as leader unless you have an auto taunt and they enemy does not have b2 or sf. He has 2nd slowest speed/health so he is bad in that way. His kit is great but he will never get an attack off without being leader with zeta.