Applying PTFs *PERM prior to new Cumulative/Groups

We are two Cumulative PTF levels behind and several levels behind on most Group PTFs.

I'm ready to install the latest and greatest today (*Delayed) for them to apply this weekend after the backup/IPL.

I seemed to recall reading that the recommendation was to install all existing PTFs *PERM prior to loading a new Cumulative/Group which I have only ever done just prior to an OS upgrade. I went searching and found:

http://archive.midrange.com/midrange-l/201212/msg01172.html

...which states, in part,

"... Perm apply every PTF that is currently out there (So you can boot off of A if needed, if a bad MF PTF is applied). ..."

What isn't said is *HOW* to install them permanently.

I would like to use this command :

APYPTF LICPGM(*ALL) APY(*PERM) DELAYED(*NO)

...because I have no window to IPL to apply them DELAYED(*YES) prior to installing the new PTFs from the Cumulative/Groups.

Can anyone tell me if this is a good/bad idea?

If it is acceptable, is there any impact on system performance while the existing PTFs are being applied *PERM?

Thanks for any advice.

Robert