Lv2 to 3 elemental building jumped to 5 hours.

Anyways, wow that stage 12 in hard mode. The 2 last enemies stack up together because their AI or something and the enemy's Nuka likes to heal both while basically one shotting anyone who comes in range because her skill does that and as defense is near useless at my current point in game. Jeez.

Cheesed through it by going straight for the artifact. First time I ever got 1 star on a stage.