'MAD' doesn't really kick in with a dual stat dependency, though, if you need to max 3 stats. If you only need 2, you're still OK, since you get to max two with 4e stat bumps with no great problem. Again, the Star Warlock is the poster boy, needing CHA & CON as attack stats, and INT to provide AC.
But here again, you don't need three. You're a spell-chucking, ranged attacker, not a front line fighter. AC and Reflex are nice if you have th epoints to spend but 4E characters are be-all/do-all characters any more.