You can lock the UI Circle in place to prevent you from accidentally dragging it around, right click to bring up options and then tick the ‘Lock window’ at the bottom of the list.
Keeping the UI Circle away from the the top of your screen means that the ‘Take All’ button on the loot screen will land directly above the Circle, meaning you wont have to move your mouse at all while collecting minions. Make sure you check the adventure type and priority settings before you click to send out your next batch of minions. Collecting and sending out your next batch of minions is now as simple as hovering over the add on and left clicking, watch the coloured boxes along the bottom to watch each minion as it is collected and then sent out.