Can Beastmaster be played as support in Guardian?

Ive been spamming beastmaster and am getting good as a pos 3, including micro the creeps. Ive tried BM in pos 5 three times and lost all games. But in all of those games the laning phase was really good because my boars can just run at the heroes, especially when im playing pos 5 and can come from behind.

Itemwise I try to aid my team with auras like pipe if no one else is building. Anyway im just curious if people think BM is viable as pos 5