backup database plus archivelog

hi all,

i want to know if my script of backup is correct, for make a restore until last sequence:

RUN

{

CROSSCHECK ARCHIVELOG ALL;

DELETE EXPIRED ARCHIVELOG ALL;

SQL 'ALTER SYSTEM ARCHIVE LOG CURRENT';

BACKUP DATABASE PLUS ARCHIVELOG;

BACKUP CURRENT CONTROLFILE;

BACKUP ARCHIVELOG ALL DELETE INPUT;

}

are there rendundant instruction?

Is correct the sequence of this istruction?

i have to make the backup of controlfile before of the backup of database?