Wep swap in combat rotation help

Hello all, I am a fury warrior and was wondering if anyone could help me, I currently have a Rotation macro that does all of my abilities in a cast sequence and works fairly well, I use Deathbringer and Brutality blade for my 1hands. Last night Blackblade of Shahram dropped in UBRS and it’s effect buffs my whole party with different random effects. I’m not looking to use it all the time in raids as fury slam 2h build but I would be interested in seeing if there was a way to weap equip it in my rotation macro right before I use whirlwind then go back to my main weapons for bloodthirst, heroic strike,… I currently use

/startattack
/cast bloodrage
/castsequence reset=combat,8 Whirlwind, Bloodthirst, Heroic Strike, bloodthirst
/startattack

If anyone has any ideas on this please let me know. I just can’t seem to make it work on my own

You could do something with modifiers but that essentially runs counter to your faceroll macro.