First of all, scout aint ment to go mid.. he needs a babysitter, and CKS like hell.. and if u do get farm, go for runed axe.. Its worthless if you get it late, cause you need it to farm up with!
And finish the whole thing before finishing boots.. you got invis, thats enough movementspeed till your axe is done..
and brutalizer is usefull, cause you get more hits in, but since you have them silenced by ward, a slow would do the trick.. a teammate could help, frostburn too or even nullfireblade? but u need a slow..