I agree with Guy Betsy on this one (see - there is a first time for everything! )

The CX lounges are a little closer, but still a long walk from where the plane will be (and only accessible if you have OW status) and I don't think they have a shower, even in F.

I can only assume that the OW airlines must be in the process of building new lounges in Terminal 2 - the current situation is very poor, particularly since the aircon in parts of BKK is not as efficient as SIN or HKG so it is possible to get quite sticky just walking from lounge to plane.