If i take this castle tonight im making Helmet/Body/Hands/Feet a full set +3 and discounted with low tax open to all NA so that is some incentive.
You might want to take into account derchios castle (not that far away) is producing heraldic tabard over mail and plate +3 32% discount, +1 faceplate, +1 cased greaves (18%), +1 hourglass gloves (18%).
Maybe make yours something a little more reasonably priced, but still good armor. I always like saracen guard armor, norman mail chausses, mail mittens, and saracen mail coif. So you don't spend all your money outfitting just one army but still get good stats. Let me know what you end up setting up, I may come down and buy some.