Risky proposition...at 9CP E8 might hit the field, and even if it does not outright chase down your Command PIV (which is totally defenceless against it), you will be down one fuel intensive unit against the most spammable and most cost-effective tank in the game. Its not like the regular PIV fares much better tho.
You should be well aware of your opponent's commander choice by CP 8. In the case of Rifle Company you probably knew before CP 1. Also remember that USF will be behind you in CPs,as they don't get the ~.5 CP for constructing a base building.