I think this is an underated (general)favor item. I could be wrong, but I dont se it taken/talked aobut much.
Many have alled for a nerf of BOTF, and I think that is a horrible Idea (in part beacuse of ToE).
While BotF give 800hp and +5, ToE gives 400hp and +5. BUT it also gives 130 minion hp. I would this wold be a viable option for LE and Oak minion build, as it gives you an HP boost, albeit weaker the BotF, but it also gives some extra life to minions, helping them survive burst AOE, or ooze.