Yes they need to simply increase the bonuses on things like gil and skill points when in groups to make it more appealing, or give groups special leves specifically designed for groups, not just the star scaling thing, but leves which say "Warning! Bad ass Kobold stomping holes in people around Wineport! go investigate with a group!" lol not those words but things like that. sure you can try it solo, maybe even win, but most likely you'd die. It still wouldn't hurt soloers and would give a reason to group up.
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