Caladbolg is a great weapon as I've said to OP before. Its the best in the arsenal for pure damage.
I prefer Apocalypse for the utility, still does great damage. With R15 augs it holds it's own and is nothing to sneeze at.
For wave 3 Dyna I can see it being pretty useful since drains still work on volte monsters (Hydra corps aren't true undead for some reason)
Personally-
If I need pure damage for a Zerg or something I'll probably go Warrior. This way the other DDs can take advantage of full break or armor break. The DD I'm paired with will also be gaining a really nice tp bonus due to war cry/savagery.
For Escha Zergs - I have Raetic Algol+1 to play with on both jobs.
Caladbolg is on my to do list, but I'm focusing time and resources on Death Penalty first.
It all comes down to play style. I usually prefer utility and play defensively instead of going pure DPS.
It's sort of like choosing between annihilator vs formalhaut on RNG. One is utility/damage, the other is pure damage.
I love being low maintenance and self sufficient to a point. In the event I take hate I can just grab the bull by the horns and go all out on most things.
YMMV if you have a mule/pocket medic cure bombing you
Play however the hell you want as long as you aren't dragging the group down.