Got a specific situations I need clarification, i have 3 ice fishermen in play, they kneel during marshalling to take 1 gold from a player and add it to my pool. After they play an action on their marshalling phase, how many can i kneel at once? do i have to wait and do one after each card they play or can i do all three at once after their first marshalled card.

Actions alternate, so you cannot use all 3 at once, he gets an action after each. But if you are first player, you can use the first after he counts income, but before he gets his first action.