heya friends, could anyone tell me the best possible pet combo for gold loot please?

kuai vs arcanite chester as base?

arcanite redd maybe for hb? ik there are other options with higher gold loot but too expensive for me hahah

and is heroic leto/grouch good for aa?

i also have a question, it doesn't specify leto's/grouch's aa on how long it lasts. do i have to activate it before killing stuff?

any other suggestions would be helpful, thank you very much in advance