Training at windraiders or Hoodoos

I think i found a new enemy to train on until early 6x and there Roids they give me about 168 Exp a kill and take 2-hits same as Golem. But Roids cant get me which is a plus.
So would it be better for me too go to Roids till earl 6x then go straight to FoG.
plus which map is better for them C-1(Pure Roid Spawn) or there MD.