For sheer energy output for matter used, it's a little hard to beat antimatter. Only,

1. There's not actually a lot of it in a hybrid charge (it's in a diffuse plasma state held in suspension to keep it from coming in contact with matter if someone, say, drops it);

2. Most explosive damage done in atmosphere comes from the blast wave ("explosive overpressure"), which can pulp people pretty nicely a disturbing distance away. Space: no atmosphere, no blast wave. It's why so few of our weapons actually can catch more than one target even though nuclear-tipped munitions are pretty common in both artillery shells and missiles. Considering what that Titan was probably designed to withstand, they must have been basically bumping hulls. I'm a little impressed it did anything at all.

Probably because your beliefs are not valid if they lead you to something like this. Someone might have listened before this betrayal, but not now.