You can do more things with castsequence. Such as multitarget sequence
/castsequence [@party2] reset=target/mod/5 0, Blessing of Kings
/castsequence [@party1] reset=target/mod/5 Blessing of Kings,n
/castsequence [@arena2] reset=target/mod/5/combat 0, Corruption
/castsequence [@arena1] reset=target/mod/5/combat Corruption,n
Using spell 'Auto Attack' can change your target in castsequence