WoW Server Lag with Long lines of code

WoW Servers must really be struggling with long lines of macro code today. Anything I put behind something is taking forever to go off

/cast [mod:shiftalt,known:Sentinel Owl,nochanneling,combat,@cursor] Sentinel Owl; nochanneling,combat] Call of the Wild

Stuff like that where its supposed to cast the second thing (CoW) if the MOD:SHIFTALT is not pressed down.

uggg been at this all day