Really, you have described having three balance funds/moderate allocation. 

In my opinion, they are all different but equal.  All three invest 35% in high quality bonds so while DODBX is listed as your pure bond exposure, that is not true, as it is just as true for the other two funds.  There may be some differences in the bond portion as PRWCX will hold convertible bonds too, and, PRWCX will hold cash in preference to bonds (I assume that means 5% moneymarket type cash).  Still, The differences in the funds is more in the stock portion (65%).

OAKBX is an all cap with average market cap very low

PRWCX is an all cap with average market cap about double OAKBX

DODBX is primarily large, some mid cap and much higher average market cap

Result:  they each capture a different part of the stock landscape and it is not possi9ble to know which one will have the best results.  OAKBX started off with about $1 and now is in the billions.  The small stocks in the fund are no longer the 'sweet spot" in the market and I assume the manage will move up in cap, but don't know that he will.

I like all three together