proletariat's cards

does he have 5 cards?  Most characters have 6, but I have 5.  Just making sure

They all have the same number, sounds like you're missing one.

You should have

1. Defensive Sacrifice
2. Hammer Sweep
3. Overwhelm
4. Regroup and Recover
5. Shared Burden
6. Sickle Formation

Also, if you have the promo pack Tactical Flanking is Proletariat's power.