Hm, I don't know... I fought him back when he could use the Ghostkerbomb over and over (TNT later changed it so one-use items are one-use for 1-player guys, too). I think I had the 125 boost then, so
maybe you could do it now with 85. He attacks with a lot of air, so an air reflector (double dryer) would be useful. Also, if you got lucky and burrowed when he threw the gbomb, you'd avoid most of the damage, since it's all fire, earth and phys. Sink is less useful because it lets through air and earth, but at least would stop the gbomb's fire and the sword's dark and phys. I'd try this strategy (from someone at IDB) that allowed me to tie him at the 85 boost and might get you a win now that he can only use the bomb once:
1: Freezer, double dryer, defend (if you're in the yellow or don't freeze, restart)
2: HP, ornate fighting fan or other higher-icon attacker, berserk
3: best attacker, dryer, burrow
4: best attacker, dryer, sink
5: dryer, downsize!, best species ability
And he shoooould be dead by then. If he heals after round 1, restart (yeah, this is gonna take a while
). Just pray he uses the jade in round 1 and the bomb when you burrow, because then he'd be a breeze.
And be happy that he can't freeze...