M is 3/2 if the caster has 'Gained JP-UP' Lv is the level of the person performing the action Where JobLevel is caster's level at their current job JP are doled out according to this equation: Gained JP Up only works strictly when they are the direct receiver of the JP and it is applied after spillover happens.ДЇor the formula of JP gain in general, we can refer to the Battle Mechanics Guide: JOB POINTS Additionally if the character gaining spillover experience has Gained JP Up it still doesn't affect the JP gained. Only the person with the ability equipped (Which explains why it always seems a lot less to me haha).

Gained JP Up - This skill does not increase the amount allies gain from spillover. More info here (This might actually be 33%, I'm finding mixed sources on this but this is doubtful). More info here.ДЇFT: War of the Lions - 25% of JP gained is spilt-over to allies. Pretty certain this works for jobs not yet unlocked and explains why some characters start with a nice amount of JP after unlocking the class ( This part is just from memory and speculation though).ДЇFT Original - 25% of JP gained is spilt-over to allies. (This happens for the Archer and Knight respectively). You will notice over time that the Monk will gain (a small amount) of JP in Archer and Knight overtime in addition to his gained Monk JP. So let's say there is a party (in battle) of a Monk, Archer, and Knight. Dead/KO allies do not gain JP-Spillover (only tested in wotl). Party members under some circumstances spill their gained JP over to other members of the party. So a Wizard that has White Magic as its secondary skillset will only gain JP as a Wizard. You gain JP (Job Points) for the Class you currently are.

Final fantasy tactics archer