/target Tankname
/assistTargets a named player and picks up whatever they are fighting. Keeps a whole group on one target without anybody calling it out loud.
The rule that shapes every EQ2 macro: there is no wait command, so a second ability on the next step simply never fires. Pair one ability with as many chat, target and pet commands as you like.
/useability "Taunt"
/g Taunting - hold your damage