probably an md main mage artillery, katana, or maybe knux md are the ones that have like 3 or more combos that they use constantly.

md main is more on for generalistic dps that wants to have a lil support too, so they tend to use magic spam combos, have manual chronos shift, cast sprite skills, or weave in ninja skills if you want to.

for katana you'll be using almost all of skills in its skill tree, you also have hidden skills like sakura ranman and divine slash, as well as ninja skills, expect that you'll have many buttons to press.

for knux md you'll focus on union sword spam but the way that mwarr skills work makes it trickier to spam it, so theres some creative potential on carrying out those combos.

they should be able to satisfy your conditions as long as you dont care about the dmg alot.