I forgot where to train.

so level them up in parallel

get them to seventy
do your three or so runs a day until 120

and boom, you're done without killing yourself grinding.

It's still good to give general advice so if they wanted to do one at a time, or wanted this knowledge for future reference, they'd know where to go.

[MENTION=2462]MetaSeraphim[/MENTION]; Usually I do a mix of Tot's/Theme dungeons (Gold Beach/Chryses/Kerning Square) until level 60, then I go to Sand Rats in Magatia until 75, then I go to Roids in Magatia until 100 (small map until 85 or so, then the large map). After that Evo/MPE will be enough for 120.