Not really, I've never encountered grind in FFX-2 until Via-Infinito (Even then I haven't ... Just fight on the way down).

I'd either get a good Stat-Rising Garment Grid and go through gates, or well... level, it seems you haven't done much more than level the Special Garments.

That said, you could complete mastery and spam the biiiIIiig skills like Great Whirl and etc.