From what I can tell the biggest benefit at this point is depth more than anything. Depth and tournaments.
Titans you got your teams pretty well built but I think this was by design somewhat (which is awesome!!)
Elena. The attack stat is immense. Makes her gun against titans. Also pretty deadly in Raid tournaments.
Next would be Kong. Agree with bubbles that he’s pretty underrated and often people forget he’s Average speed putting him at the same as Wilbur and Falcon (good for events!)
Morgan!! She’s an absolute weapon in the wing. Mine is now +16 and features in pretty well every war and raid defence. She’s also beastly in raid offence as she’s healing dot. Means that she ignores all the buffs etc… That get cast. I’ve also on a number of occasions had her clear out a crappy raid all on her own by multi-casting the special on the enemies…
Greg would be next, the crit buff tho is overrated imo for titans as the same effect can permanently be achieved with troops…
Probably Richard next. Get some extra DoA damage into your blues. The attack debuff is also a good bonus against raid enemies.
Also will serve as a blue tank should you want one for tournaments and wars.
Second Arthur or Magni would be next options.
Leo. Go for variety and a second sniper. Second Inari would only be good for more titan damage but… Leo is probably better in the bigger scheme of things.
Quintus. The DoA is great in a purple stack. Plus his attack stat isn’t something to sneeze at. Also great for RA tournaments.
Dom would only be for recommended only for titans (for the yellow buff) but I can’t see her displacing any of the obvious ones (panther, kage, Kunchen & Seshat… Maybe seshat but…?)