Regen rates at a value of 0 might cause the server to make an intelligent attempt at determining its regen rate. Set the regen rates to 1. For any level after 5, a 1 hp/tick regen should not make a mob any harder to killl than having no regen.
Also, before you dismiss this as being a server problem, be sure your mobs don't have any (1) regen buffs cast on them by nearby mobs, and (2) don't have any equipment in their loot tables that is a worn regen buff (ie fungi tunics and the like). Mobs tend to equip any pieces of armor that exist in their loot tables.
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<idleRPG> Rogean ate a plate of discounted, day-old sushi. This terrible calamity has slowed them 0 days, 15:13:51 from level 48.
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