Skaven Technology is known for being inventive but highly volatile. Yet, in the game we have Warpfire Throwers which literally never malfunction. On the other hand, we have proven Dwarven Technology, usually tested for decades or longer, which overheats and explodes if used to much. While I understand the need to accustom certain lore elements to gameplay, the situation in-game is basically reversed to lore.
Therefore, I demand that Warpfire Throwers shall be able to overheat as well. If a Warpfire Thrower fires for a (near) constant 15 (or maybe 10) seconds, he should have a chance of overheating and exploding with the chance increasing by about 6.6 % per seconds after the initial 15 seconds phase. Latest at 30 seconds, he would reach a chance of 100 % and explode by default. The more the Warpfire Thrower overheats, the more damage it will do and the larger and stronger the explosion will be. EDIT: The explosion doesn’t have to be spherical. It could be a final high damage warpplasma lance. This would make overheating more unfavourable for players.
This mechanic could be limited to Cataclysm (and Legend) only if necessary, giving the Warpfire Thrower a slightly new “behaviour” at higher difficulties. It would increase the danger level of the specials (aside from pushing and blinding effects) but could also be used to make them deliberately detonate to clean hordes.
Sidemark: This is not about me watching my team and myself being roasted by Warpfire Throwers for prolonged time. Like totally not.