Random bit of information, I have a 2nd job warrior without PS (well, it has level 4 - in GMS this is 130%, same as SB, but costs 4mp) and it has no problem with winning CPQ vs similar level chars.
In any situation where you hit 2 monsters, PS is pointless. If you're not hitting mobs in CPQ, Bandit/Assassin beat you anyway since they have higher dps (but no mob skills). Just party with someone to take out teh single monsters.
If the 25 def/mdef the summon gives stack with Iron Body I'd say get those 2. Otherwise just go with max summon + 11 PS.
In any situation where you hit 2 monsters, PS is pointless. If you're not hitting mobs in CPQ, Bandit/Assassin beat you anyway since they have higher dps (but no mob skills). Just party with someone to take out teh single monsters.
If the 25 def/mdef the summon gives stack with Iron Body I'd say get those 2. Otherwise just go with max summon + 11 PS.