Main sheeped, alt does nothing :S

[Catamer]

you could try these, it allows your alts to solo cast on thier own targets
/cast [target=party1target] [target=target] whatever
some use
/cast [target=party1target] [ ] whatever

the problem I see with these is that if the main target is out of range but some alt has a target that is in range :wacko: ... nothing is for free