-Keep all characters in their own sections of the sphere grid. In other words do not take anyone down anyone else’s path. "Kihmari thinks Rikku should stay Rikku." Keep everyone in their intended areas.
-Do not obtain any legendary weapons.
-Never use any aeons, unless you are fighting Belgamine or another summoner or yuna gets her overdrive grand summon, in which case they must be dismissed as soon as they use one overdrive.
-Do not obtain the extra aeons, Anima, Yojimbo, or the Magus Sisters.
-Do not build up the stats of your aeons
-Do not obtain double-cast for Lulu, for me at least she hits just hard enough.
-Cannot use Dark Matters or Mega Elixirs in battle.
-Do not purposely spend time charging overdrives before a battle.
-You may spend much time as you want learning overdrives and overdrive modes.
-You may spend as much time as you want customizing weapons, in fact, you are going to need to. Just don't waste time on break damage or hp limit, cause you aren’t going to get close anyway :P