Void pool would be a good place to drop these minax arties in the future. The more waves and far you reach in the void pool, the more chance the minax arties would drop, could be like 10% chance to drop for each 10 waves, so basically, if someone would reach waves number 100+, one minax arty would certainly drop each wave among all attackers. It would absolutly repopulate the void pool which have almost been forgotten. Examples [EDITED]: [Or it could be as simple as 1% drop for each additional wave] Waves number 1-10 = 1% chance for minax arty for each starting waves. Waves 11-20 = 10% chance that one would drop in each of these waves. Waves 21-30= 20% Waves 31-40= 30% Waves 41-50= 40% Waves 51-60= 50% Waves 101-110+, there will be 100% chance to drop one arty/wave among all attackers. And for each other 10 waves, add a second arty drop among all attackers.