Alright, the first fight with the
Spoiler
just about drove me to murder, but I ended up just stealing the tank a few times and was able to take him out that way. Last night, though, I got through the
Spoiler
and god DAMN was that **** frustrating. After getting pissed that it was taking forever, I hit up some FAQs to see if there was a better way to do it, and they all seem to recommend the Air Groundspike Graveyard devastator, but I didn't have that, so I was forced to just run away for a bit, consume a bunch of random people, then run back and hope I was able to get close enough to use a regular ground-based Groundspike Graveyard before I took too much damage to do it.

Took for damn EVER. I'm probably going to get to the final (famously cheap and frustrating) boss and just say screw it.