the current regeneration system is not helpful for players with large health pool of at all for any thrall. when a we want to heal a thrall, it takes a long time. 
please change the regeneration value from HP points to percentage for example a weak aloe potion heals 15% of health and a pure aloe potion heals 90% of health for players and for thralls because of their large health pool make it like a pure aloe potion heals 35%