Partying is great

[Tsukino]

Parties are great, battle regimens are terrible. Don't get it twisted.

What, exactly, is bad about battle regimens? You can combine skills for more powerful effects, and they show up in a list that makes the whole thing much easier to execute than a skillchain in FFXI since you have a visual cue as to when your turn is. You also don't have to prevent everyone else from using weapon skills out of fear of messing it up either; as long as they don't hit the BR button they can do whatever.