That integrated graphics card is a real bottleneck to deal with, if that was better then he'd be able to run the game easily. A pity that thing is what he has.
I think once beta 7 comes out he could run the game at 20FPS if he plays at a low resolution, something equivelent to 720P, as in beta 7 we get a new UI which heavily improves this games performance. However I think he would struggle if there were more than 4 players, or if there were 4 players in the late game. I will say though that because of steams refund policy, you can always try it anyway, but wait till beta 7 is released before you do, it's unlikely the game will run any smoother after that.