It might be interesting if, perhaps at higher levels maybe, one could train or otherwise adjust how the idler solver chooses groups. For instance, choose to prioritize colours in a certain order, or the smallest/largest available group of orbs. Another option might be position on the board; closest to the top/bottom/left/right. Or perhaps, target first the colour of the critter closest to the cube, or with the largest/smallest multiplier, or with a multiplier less than x. (The last option is not quite so vital anymore now that armor has been done away with.)
 "Magirune 2"){kind=icon}
 "Puzzle Fuzz: Idle Stories"){kind=icon}
The shields will sustain them even if they have no HP. We're working on how to better message this to players, suggestions welcome!