Nothing prevents a staggered character using swift or immediate actions. As you’ve observed, the wording of the staggered condition does not preclude a character using swift, immediate, or free actions when appropriate – or from making attacks of opportunity.
Can you 5-foot step while staggered?
Sadly, that is an ambiguous situation in Pathfinder 1st Edition, but if we take the most straightforward view of the rules, a 5-foot step is permitted while slowed or staggered.
Can you Upcast haste?
Yes, you can cast Haste on yourself. The reason they must be a WILLING target is due to the downside of the spell at the end.
Can you cast a spell with the haste action?
You can cast a spell using either your bonus action or reaction but no spell can be cast using the haste action. cast a spell as a bonus action, take the attack action with your action (proccing extra attack), make one additional attack with the haste action. Also a rogue who gains extra attack and dual weilds could get 4 attacks with haste.
When does haste give you an extra action?
Haste gives you an extra attack action. “Making an attack” as part of the attack action is defined as “Whether you’re striking with a melee weapon, firing a weapon at range, or MAKING AN ATTACK ROLL as part of a spell, an attack has a simple structure. So as long as the extra action is an attack spell you should be able to cast it.
What does haste do on one weapon attack only?
Haste: Until the spell ends, the target’s speed is doubled, it gains a +2 bonus to AC, it has advantage on Dexterity saving throws, and it gains an additional action on each of its turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.
What happens when you use haste on a creature?
Choose a willing creature that you can see within range. Until the spell ends, the target’s speed is doubled, it gains a +2 bonus to AC, it has advantage on Dexterity saving throws, and it gains an additional action on each of its turns.
