Modifier target argument

[gr0by]

I have a Macro like this

#showtooltip
/cast [nomodifier] Charge
/cast [nomodifier] Victoryrush
/cast [mod:alt] Intervene
/targetfriend
/targetlastenemy

and it work, but sometime ist stuck an stop working for me.
i need to clean up, optimize this und i need help.

1. Charge the target
2. use victoryrush it is ready

3. alt modifier's cast intervene a friendly target and target the last target.

i think the problem is i dont know how i use targetfriend and targetlastenemy with modifier's like

/[mod:alt] targetfriend
/[mod:alt] targetlastenemy
thank you for your help