Code:
alias ajoin {
 join #channel1
 .timerjoin 1 2 join #channel2
 .timerjoin 2 4 join #channel3
 .timerjoin 3 6 join #channel4
}

goes in to remote ALT + R in mirc. /ajoin <- trigger it.

Replace the #channel1-4 to your channel. Maybe you need to edit the numbers 2 - 4 - 6 in the timers to fit your needs.

if ($me != tired) { return } | else { echo -a Get a pot of coffee now $+($me,.) }