Darth maul worth it?

He's a lot of fun when Omega'd. I use him behind an EP lead in GW and only keep him in the first 2-3 nodes and then I pull him. When/if I run up against a Chaze/Rebel squad I put him in and Daze away - by this time he has nearly twice the health he started with. He needs some good speed on him though, mine's a measly 134 (seen Arena teams with 165+ Mauls, one with a 185 speed!). He has heavy critical ability - critical chance tops 50% without mods at G10. He can also recover ridiculous levels of health with each attack provided three enemies have died - 25% of attack damage which with his criticals averages 7k. I imagine Zaul is even better.