RMAN :: Incremental Backup - Archive Log?

We are going to implement oracle 11g. Now I wanna use rman to take the incremental backup in the follwing way:

Level-0 backup weekly, in the way:

run
{
allocate channel c1 type disk;
allocate channel c2 type disk;
BACKUP incremental level 0 DATABASE
TAG 'Weekly_full' FORMAT 'E:RMAN_backupweekly_full_%d_%Y%M%D_s%s_p%p.bak';
backup archivelog all not backed up 1 times delete input
TAG 'Weekly_full_arc' FORMAT 'E:RMAN_backupweekly_full_arc_%d_%Y%M%D_s%s_p%p.bak';

[code].....

and RETENTION POLICY TO RECOVERY WINDOW is set to 10 days, so that there is no chance that i will delete expired backup before taking backup.

Now my question is,

1) Is the way is correct that there is no wrong configuration. My main concern is about archive log, is it correct?

2) As i am deleting archive log files with the backup and after that the expired archive log backup is also deleted, so is there any chance of failure in recovery.

3) here how archive log backup will work with 10 days retention policy.