... really?
Especially after Azazel Awakening (still ages away), you're reaaaaally not going to have any problems. If anything you might want to get Gaia as that ought to be useful against Thunder Rag or other nasty content, but if you're not feeling that defensive playstyle, fair enough.
Didn't you have Belial? If so, you're missing out on Uriel.
And lastly, Light is going to be stupid as fuck in the upcoming year. You have Michael, but not Tish. So that's also an option.
You utter hacker also have Thunder Aphro somehow (AND Thunder Ryu-Oh), so investing in Thunder would be fine too. That would be Raiko or SSR Baal, I guess.