-Speed Boost makes it a douche to revenge kill. After 2 only insane stuff like Jolly Excadrill in sand can outspeed it, and you need REALLY good priority to revenge. (It resists Bullet Punch and Sucker Punch, Mach Punch only hurts its its from something like Technician Breloom, you need Aqua Jet or a super strong Extremespeed.)
-Huge offensive movepool, including TWO base 120+ power STAB moves for both physical and special attacking and a large array of coverage moves.
-Sunlight support lets it muscle past its counters with Flare Blitz.
-Speed Boost + SD = oh dear, and it can go mixed for unpredictablity.
Pretty much 4th gen Salamence if Mence had Speed Boost and Swords Dance is what I'm trying to say.
Even though i spammed multiple threads already (sorry:P), just wanted to inform you that i already reserved Ulgamoth analysis yesterday (though i did it as Urugamosu, so your search might've missed it).
But since you probably tested this mon quite a bit, i'm interested if you have found out any useful and interesting sets that would be worthy of analysis. So far i only plan to include offensive BD with 252 SpA/ 252 Spe spread and bulky BD with 252 HP/ 252 Def spread, but feel free to submit me any other sets you might've found.