it`s not a good idea to rush if u go for ghouls... you just can`t do much burrows > ghouls, you might get some peon kills or mb a burrow but that`s all you can`t fight him there.Best way is go for altar + zig, harass like you do in the hum strat, then get some ghouls and fight trying to get some surrounds, then get 2-3, fiends with web(he`ll surely wanna get wyverns) then eventually go for mass destro and ofc orb on lich and if he goes for a most ground army like grunts raiders trolls etc, get a CL with impale as 3rd.