When to draft AM? What is AM current Tier???

The main weakness of anti mage is his early game. He is only weakened this meta because of early game fights being encouraged. He is a fantastic farmer and a split pusher, but dies easily in the early game.

It's just the meta shifting making afk farmers in the early game impractical picks.

Like, think about it, you don't see Naga Siren, Medusa, Spectre, Morphling (Core) or Anti-Mage in the meta, despite all of the heroes being at least semi strong (And some like Naga having been buffed hugely), becuase the meta does not suit heroes that need 2-3 items to be impactful, and can't bring a lot to early fights, or early pushes.

None of them are exactly bad heroes, it's just a bad time to have them.