grixis

wasn't sure if this is where i'd post this, i'm new to the forum, but i had a question about regen. You can get little regen bonuses from sets, like 4%, 8% etc, but is there a point where getting the hp bonuses would benefit more. Cause the more hp you have the more you are regening. So i guess my question is, if u already have so much regen, which is better, more regen? or more max hp?