Do party spells stack?

Question

I know every vocation has its own unique party spell.

1. Let's say if I'm hunting in a team with different vocations, are we all allowed to use our party spell, or is it one spell at a time?
2. What about if there's 2 of the same vocation, are we allowed to have 2 of these party spells from the same vocation?

Answer 1

1. yes you can have all the  vocations buffs at same time.

2. the spells dont stack but reset each other coldown also the spells cancel effect of potions so watch out if your party is using mastermind potions.

Answer 2

1. Yes, you can stack the four differents Party Spells. Also the Party Spells reset each other coldown.

2. If you use the same spell twice, the second spell renew the time effect of the first, but dont stack. Also the spell cancel the effect of Potions like  Mastermind Potion and Foods like  Tropical Fried Terrorbird.