Lol deslow and Rakim, ive played them a couple times, soloed or stacked team games, they are completely oblivious to rush builds , aka dark arrow. I know I am gonna make it sound easy but it wont be, dark arrow is probably ur best bet vs them if you solo them, its worked for me so far. Ive only lost 1 game to them (I disconnected lol, still counts).
As far I see they aren't too good with the whole 2 heroes thing. If you play with friends baj and you see them, pull their strat on them, I have makes them mad. Maybe it'll send em a message.
And I do agree the whole 2 hero thing with intention, completely OP, but these guys don't do it right which makes em easy for me at least to beat. If they timed all their items upgrades correctly than they'd be a threat.