Have two Ampr Combos which will cost 1mp both of them.
1- This one requires: Hard Hit [or any 1mp Skill that doesnt charge] + Berserk (save) + Rampage (Switft). [This last effect is not neccesary, unless you wanna do the combo quicker]
2- This one will require finishing Mq which may leave you near 150, for unlocking T4 (Lv4) Magic Skills. So you can have Finale. You will require: [Any 1mp skill] + Decoy (save) + Finale (save).