Brutal Boycott.

[Torankusu]

If you guys absolutely need to map, then do immenses. They will give you accurate EXP, but you will just have to do two of them to equal one brutal, which, will save you some money, but the Brutal sellers will not make sales.

So, but two immenses for four diamonds total, and you have the equivalent of a brutal.

And also, the people that sell them are somewhat new, otherwise they would probably do the brutals themselves.