hi nice build i suggest swapping out transfusion for volatile zombie (go for the traversal node in skelettal mages for mobility), volatile zombie gives you tons of convenient stacks + applies infernal shade + mark for death on explosion, you can use the node to spawn 3 at a time with a mild CD so you press it once every few seconds and have 100% uptime on frozen light, mark for death and infernal shade (on bosses at least)
only downside is respawning your mages when they get nuked in boss aoe, which can be annyoing since its hard to move them to specific spots, im experimenting with the node that teleports minions to you after using traversal + the boots enchant to fix that
alternatively you can spec that mages sacrefice your warriors, just take the note to limit warriors to 1 at a time and resummon to gain stacks, i feel like everything is better than using transplant on those small boneminions
anyway this is a very solid baseline since this is my first arpg and i dont know much it helped me get into lategame and experiment myself thank you for your effort