It amuses me that Titan EX is a gatekeeping fight for the Primal content after him, all of which is much easier. I'm sure that'll reflect well on the health of endgame by the time 2.5 is out.
That said, keep at it, OP. Eventually you'll roll the right lucky group, just like you'll roll the right lucky Atma drop...an LS or FC helps if you can get one.