I think that the buffer kit should come with a lingering haste potion instead of a lingering regeneration potion. The regen feels somewhat useless because anyone can benefit from it, including opposite team. However, with the haste potion, you could encase yourself in sandstone around another teams egg, and use the potion to help you break it faster if they have obsidian or something. Maybe the other team could get some of the effect and break your casing faster, but maybe not. Either way, the regen seems pretty useless especially because you need to stay in one spot. The one spot that people want to be at the most is next to someone's egg, so I feel that it could be used far more. Just an idea, I hope you consider it!