Nimbus V1 - Autopsy line is a nice followup after round 2. Afro Samurai and Super Saiyan are nerdy but decent. Nice rhyme scheme. A few lines ('everything sounds the same') could be personals but aren't very specific.
Cynic V1 - Just an Avatar is amusing in response to two anime bars. Stripes back/hype track is a damn hard hit. Fanbase of 4 is a funny line, dick-sucking is weak.
Nimbus V2 - No fly zone is decent, south flip is decent. Incarnation of a deity is a little off-beat. Dispatching amateurs sounds nice as hell. Name diss is nice but you played the jet plane flip a little too long. Finisher could have been better.
Cynic V2 - Points out lack of multis, nice. Dropping the soap/rape lines are corny. Models with fake guns is another heavy duty diss. Finisher is also very strong.
Props to MustyElbow for a grungy beat, I'd give Cynic the win for more aggressive personals. Nimbus was more showy but Cynic was BATTLING.