Undying is 3/4s fine, I think they just need to rework Soul Rip somewhat because it feels like such a useless skill. I like the idea of making the heal/damage % based, which would help it be more of a late-game skill. Let Tombstone be excellent early and let Soul Rip be excellent late
whaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaat
only thing undying needs imo is slightly better scaling on tombstone hp, maybe 250/500/750/1000 instead of 200/400/600/800.