Caster is definitely going to help in any kind of organized escape/rioting et all. He got natural high-pain resistance, so he could play a bait, where he suddenly gets much more lively than a guard could expect a bloody mess to be. While he is the type to help and stay behind, he got rolled as one of those who do escape, so— there are plans for someone pulling on him the "I'm a buffer for your escape" instead (looks at Judar, looks at Archer)

Since his magic specialization lies in Enchantment, and while he doesn't know healing spells, he knows one that turns off pain. So once the magic dampening effects are out of the picture, he could act as a dose of morphine for the fellow escapees.