MultiBow only against creeps? with upgrade?

[TKF]

Why's that. The major disadvantage is that if you go lane alone with this weapon, the enemies normal weapon could still hit you, while only your tank cannon skill can hit them. However in mid, you're rarely alone and your teammates usually have normal weapons, so you can assist them in pushing. Also it has 800 range, which I find as a very uncomfortable short range when your enemies have slightly higher range.