A Titan can improve it slightly, as no weapon slot is took up.
Or maybe a gavel (lol) for the quanta damage ratio.
I'd agree with the Titan, not so much the gavel.
Lol, I was joking with the gavel only. But hey, it's almost strictly better than graviton guard. You won't overdrive them anyways, as chargers/armagios are much better targets. It's that I'm trying to reach the Pareto optimum by replacing something with stuff that is strictly better (it is, as long as you don't plan to overdrive guards). But if you wanna overdrive guards, that's another story...
But yes, Titan improves this deck by a bit. Although it can't be overdriven, it still has 1 more damage than charger, and look, you only have 2 overdrives...