Acid Reaver
Information
The Acid Reaver is a great unit killer who is meant to get into the fray, fighting to the death with his powerful close-ranged spells. Skills like Caustic Breath and Acid Sheath allow for his greater survival. At level 15 he is great for base-ysieging, able to reduce the armor of enemi in the area and buildings so building will die faster. If you want this hero to survive longer when sieging bases you should get knights armor and orb of Life, you then can get Rings of Might.
He is a good combo with the Scarab when they are sieging bases with both there ultimates. They both will be able to destroy bases if they have a big enough army with them.
The BEST!! combo with this Hero is Gravel with his ultimate which can rip up bases the quickest with his ULTIMATE.
A secondary combo is with the Harpy Hero with Chaos Rift which can also deal a good amount of damage to buildings.
Personally I don't like this hero that much because of his lacking to move around easily.