Ok Home, let me tell you my ideas ( the gear that i use ):
1. Stam + int set. You use it when you dont have enough healers or when you are alone and kiting. FOr this one you just change the chest to the BoA int, get stillwater's signet, firebane, and dont change anything else.
2. Stam + agil set. You use this one when you are well defended and want to help with killing the inc. Also good when you are with more than 4 stacks. The agil gives you pretty good dmg + a lot more armor which is bis for guards. To complete this set, get the honor neck, agil boa chest, agil boa honor should, boa 2h mace, leggings of the fang, sentry cloak and change garrosh to the honor one ( 5 agil 5 str 2 stam ) or stillwater's signet.
IMO the first set is mainly for Resto FCs, thats why i dont like to use it on my guard. prefer the agi one, because the idea of guard imo is not only to survive, but to kill smbd while surviving. If you want to stack int and heal - go resto, guardian is different type of fc, more like warr or prot pally.
Everything here is IMO only. Hope it helps. Cya !
P.P. As you can see i didnt mention blood ring or mystics, nor crafty + the dager because the idea for BIS BIS stam is only for fun imo. There is no reaseon to lose all the stats you get from a staff/2h mace only for 1 stam... Even if you have the best healers in the world this is not a good gear for wsg.