Holy Jesus, I didn't expect it to be this simple. Works perfectly, thanks.
@edit How do I add so that it opens next bp after dropping all of the stuff?
The way I was thinking was: at the end of dropping all the stuff he checks if the lootbp is empty - if not, open next bp and repeat process. Do that until lootbp is empty then he carries on with regular waypoints. Would be super grateful if you could help me with that or another solution if there's a better one.
Another way is that he opens till last bp, then presses 'show higher container' arrow in the corner until he reaches main bp.