Oh yeah true I forgot about orb generation from the bubbles the warlocks would actually have to kill a few Titans to generate orbs. So if the Titans did it flawlessly and timely they would "outlast" the nova bomb barrage of only a few or none die.
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it also depends on how open the battlefield is if it's open then titans bubblefort 100% if it has a lot of corners and the bubble fort is to close to one a blade dancer has a small chance of getting in and maybe one kill before getting squashed by a FoH