santa devo 180 4/8 bw
wl devo 180 enli 5/5
My vote would be warlock for sure your not gonna need that enlighten anymore soon. Just push him as far as u can toward 200 before u HAVE to replace it (quest refresh), use gems to sweep dungeons even is worth it if u have to, good luck.
With Guild Wars I would probably say Warlock too.
Santa, while dealing huge damage, also powers up the enemy heroes and isnt used very much anymore.
Both would benefit hugely from it but I would hit Warlock for Guild Wars sniping
My warlock has wargod 8/8 with a 5/5 revitalize crest. He's a best. Def put it on him. As mentioned since you have 5/5 enlighten I would try and get as many exp you can before you HAVE to replace the talent ( quest board ).