just a suggestion, but try some of the normal monsters outside Abyssea that they added in the 80-90+ range, especially during Martial master (although I can't remember any of those added in the original/zilart areas where MM is active). Regardless, i get great skill-ups at all levels outside Abyssea, regardless of area.

Of course, I'm not including parry, guard or shield, that's an entirely different proposition involving farming evasion/agility down gear, bringing a healer or something and basically gimping every defensive skill you have, then picking a fight with a mob of mobs and hoping not to die in the process. Honestly, would it be that hard to have some mechanic we can select in game (or an arena) where we can set the proc order for defensive skills so we can set evasion as the LAST to be checked?