I'm thinking Space Magic Flame Thrower! Semi-short range. Lingering thin bands of damaging flames if you direct it at a floor or wall. Perhaps upgrades to extend range or have affected enemies set each other on fire if they bunch up?

If anything, Titans should wield a shield like the Cabal.

That could be fun too! It would make it unique from the bladedancer too and they already have similar mechanics in the game via the relic.