Bloodthirst with /startattack and /cancelaura
World of Warcraft Classic
#showtooltip Bloodthirst /cancelaura Blessing of Protection /startattack /cast Bloodthirst
This macro will remove Blessing of Protection Icon Blessing of Protection from your character, start auto-attacking your current target, and cast Bloodthirst Icon Bloodthirst. You can add /cancelaura BoP to all your offensive abilities for added convenience or make a separate macro to dispel it.