Who would win:
1) If Opal starts fused, Jasper can have destabilizer
2) Or Pearl & Ameythst vs Jasper alone, option to fuse is there (This might have been done offscreen in The Return, tho Gem destabilzers, Gem ship, Peridot & Lapis were also there)
I say Opal takes Jasper even if carrying destabilizer. Would like to think starting unfused against Jasper alone would still lead to Opal victory but not sure.