Enigma + Maras + Arach + Battle command gives another +6 multi. For those that use shako over a circlet it gives +8 multi.
Yeah, repairs are gonna be a beotch but seems good for an optimal setup though. Maybe just use them in duels vs. non noobs where the extra edge is worth the repairing, and could give you the edge you need to win.
So is Guided Arrow which is given as an oskill from Widowmaker unique ward bow... You could easily get in the area of slvl 14-16 guided arrow which is roughly, what, 80% enhanced damage??? It tracks its prey, and costs less mana the higher it gets... Venomsin with open wounds rocks with this weapon.... and as others have said, the charges of multi are too expensive, too few, to low a skill level, and do less damage than a guided arrow would. A decent and original idea though, stylewise, but it won't prove all that effective.
+skills do help charged items, so you can get a decent level multishot.
I still think it would work very well, if you have ever dueled a zon who used multi you would know how hard it is to dodge. Granted the damage is low, but with venom it would make it nearly as damaging as taking a shot from guided.
I'm not saying use only multishot, I'm saying use both multi and guided in a duel. Also, I hate to break it to you but 80%ED isn't where the damage is coming from on a bowsin.