Coil - now it's quite ok. However, if the euthanasi squads get a size change from 1-3 to 2-4 - as Wedge proposed - there will be a problem:
4-man euthanasi squad: 28
3 cavaliers+FT specialist: 136
total: 164, repeat as many times, as you want. Result? E.g. a 1000 points army list will have 13 activations (add 1 2-man euthanasi squads), 7 euthanasi squads go first (at this moment a lot of armies this size will nearly run out of activations), and then you have 6 activations with 2 WD MV5 flamethrowers (and 6 AR 20 "ablative wounds" per activation in the form of regular cavaliers. Armed and dangerous wounds). Oh - and those guys have guerilla training, so you're shooting at them at -1. If you play on a table with at least moderate amount of cover, the oponent is not in trouble - he's already dead, the execution is merely a formality.