i had the same problem.and with those rounds!lol.well, lvl up to 99, cuz that the limit.what i did was synthesize alot of power, defence, and ap boosts.it really helped me.i had more abilities.it's still was hard for me but round 49 is surprising easy.round 49 is againest cloud, leon, tifa, and yuffie.it may sound really hard but when i did it i used trinity limit.then i ran away from then(cuz i didnt hav any items)and waited till i had my magic back and used trinity again.surpsiingly thats all it took for the first try.it may take you 3 tinityies and then u might hav to use a finsinhing combo to finsh it but i hope u understadn that.lol.oh, and also sythesize ultima and dont use fenrir cuz of the negative combo, u cant finish them off