the answer to both your questions is no. it's unlikely you'll find a need to build a second deacon (unless you end up running a clan boss setup that requires him and don't want to alter the one you use for the other areas of the game), but you'll get much more value out of keeping the second one as a faction guardian than you will from feeding him. you will also probably want to leave him at level 1; there's no benefit to bringing him up to 40 and it would cost you resources that would be of more use elsewhere.

Just build a single Deacon, and before even that, get your starter champ to 60 to work as a Campaign Farmer. Then you can more quickly level your Wukong and other champs that come after.