I don't think that you need too much work on making out some tactics for this game, when the objective is to kill a boss then you just go straight for it without hasitation and it usually dies in 3 turns if your chars are the "correct" lvl, meaning having done all side quests to the point and never avoid fights by reloading and so on.
My char(the main char) is a Knight with two swords(ninja skill), switch mp(time mage skill) and teleport(again time mage skill) and as sub command I have items with x-potion, phoenix down and high either. With the teleport skill I go immidiatly to my targets and kick their usses in one turn wit the two sword ability, my mp takes all the dmg from the first hit so I have no worries till a healer come close and heal me - that's my main strategy, I overpower my opponents. When the objective is to kill all enemies I take out all mages > archers > the rest in that turn until there are no more of them on the field.
Pretty simple eh?
My main chars are a Lancer(with items), a Black Mage(with items), a White Mage(with items), a Chemist(with white magic and gun) and those buffed up guests that turn out to be part of the party later on each of them with as much as possible hp and able to stand on their own for at least two turns each without getting healed for example one of my fav feats is the wear heavy armor that you get from the Knight job, extremely usefull for squisy mages and healers.