I have GMK Oblivion V2 [Monochrome Base], and I bought it because it has low contrast thanks to the off-white legends.
It's my understanding that GMK Oblivion V1 used a brighter colour [CP?] for the alphas and legends.
I like the Oblivion V2 monochrome legends. But in an ABS MT3 set, it might be more fun to go all-out with the CP or WS1 legends/alphas.
EDIT: Yeah, I said it wrong earlier. I meant that I liked the beige-ish legends in Oblivion V2, but I think that a more pure/solid white legend colour would be better on an MT3 set. But you will have a much better sense of what to do.