Pulvy's good for upgraded rainbows and Flay 'Em, but since you already have a Monoaether that can farm Half-Bloods and Bronze/Silver to get the upgrades it needs to farm FG's, that would be an unnecessary detour for you. I always say you should choose cards for the deck you -plan- to make, so it's up to you. 2 Lobos are necessary for MA to do better against all non-FG opponents, and necessary to farm FG's.
In addition, you'll be winning plenty of rares as you farm, especially if against Bronze. I would, however, suggest that you cut your deck size down to 30 and add another Dim Shield to make drawing them more likely. After that I would focus on either Phase Dragons+Immortals or Psions+Fractal. Extensive testing and experience has shown those are the most efficient builds.