Inviting your characters to fellowship made easy

[Frostt]

There is, lotro allows skill target forwarding. You just target the main character and any attack skill you use is forwarded to the masters target and the slaves will nuke away while any beneficial skill you use on the master is done on the master.

[Xtremepayne]

Frost is correct, This option is disabled by default. To enable it, go to options, then combat options and then about 1/3 of th way down you should find it.