so basicly for mage instead of this macro:
/cast [exists,harm,nodead] fireball
/stopmacro [exists,harm,nodead]
/assist party1
/cast [exists,harm,nodead] fireball

i could use macro like this for example? and it does frostbolts,fireballs and ends with fireblast with single key stroke?:
/cast [exists,harm,nodead] frostbolt
/assist party1
/castsequence
/cast [exists,harm,nodead] frostbolt
/castsequence
/cast [exists,harm,nodead] fireball
/castsequence
/cast [exists,harm,nodead] fireblast