im thinking of starting again. just want to know other skills/ability to avoid like shirahadori,teleport. im currently grinding stats for ramza,and two other characters. is stat grinding just a waste of time? oh,do anyone use the insane difficulty? want to try it but it seems to have many bugs. thanks in advance.
Patches like 1.3 and Arena are fantastic, and not buggy although they can be a pain to set up. Worth the time investment IMO.
As for cheap, it's a fine line that's in a different spot for everyone. The AI isn't the sharpest tool in the shed, so over half of what's available to you can be abused to the point of "cheap". Brave/Faith manipulation, Math Skill shenanigans, MP Switch + Move MP Up (heh, haven't used that one in ages)...the list goes on.
I agree with the previous answer- have fun. If it isn't fun, you crossed the line into cheap.
An easy challenge might be something like an all Mage group with no physical/melee units. For something harder but pretty fun you could try a Beastmaster run- use Ramza and recruited monsters instead of generics/specials.