Please don't try to tell me that the AOE of Angelic Fury even approaches that of Vengeance. It's not even close.

Priests are ridiculously underrated. If used properly (this applies both to general priests and reinforcement priests), they are ridiculously useful. Midgame, the reinforcement priests can be expected to heal about ~600 health, depending on how much actual health you have...and they can heal you every 8 seconds. That's 75 health per second! Higher-end priests are even better. Sedna's buffed priests can heal 30% of your max hp every 8 seconds.

Being able to render all that healing null is a ridiculous advantage.

also...yetis are awesome. Most people just don't know how to play minion builds.

I meant vs Ice Rain.

Plague is not so useless as people make it out to be. the main uses, as have been mentioned by others, are for "tagging" and interrupting HoL (or any of the other effects that break on damage). those are both highly significant uses in my opinion, but thats not the only thing its good for. 

Plague spreads around the map remotely and is contagious. it puts damage on your opponents without you being there. its like a passive -10 (or -15 at rank 2) to enemy health regen. 

its immensely useful in gaining an advantage in unattended lanes where creep vs. creep is going on. your creep waves will win if the enemy is plagued. they'll advance further and push up the battle front deeper into enemy territory. 

so yeah, the damage isn't going to be enough to win a specific encounter vs. an enemy DG but Plague has a much larger, distributed map influencing effect. it should not be discounted as readily as it is. 

erebus bite definitely needs a buff.