For the attention of Mr. Killcrazy

[Pwnstar]

As discussed, just change the name of the weapons to whatever you're using in their stead. Spam this and it will interrupt.

#showtooltip Shield Bash
/cast [stance:1/2,equippedhields] Shield Bash; [stance:3] Defensive Stance
/stopmacro [equipped: Shields]
/stopcasting
/equip Peacekeeper Blade
/equip Royal Crest of Lordaeron

And here is a similar one for Spell reflect, more PvP based but still helpful.

#showtooltip Spell Reflection
/cast [stance:1/2,equippedhields] Spell Reflection; [stance:3] Defensive Stance
/stopmacro [equipped: Shields]
/stopcasting
/equip Peacekeeper Blade
/equip Royal Crest of Lordaeron

 

[Pwnstar]

#showtooltip X
/equip Y
/startattack
/cast X

X being Spell name
Y Being Weapon name

 

[KillCrazy]

Thanks mate!