Paladin is another name for a B+N mover at least according the the http://chessvariants.org website. Having a R+N mover at the edge or close to the edge of the board would avoid having a couple of pawns unprotected at the beginning of the game, which is one criticism that Janus chess and some other 10x8 variants recieve.

I think the chess variants site also has in the zillions of games engine a big board variant that does use two R+N movers, but I can't remember its name. I think traditionally it has been more typical to mix the two pieces like in Embassy or Gothic Chess rather than having two of the same. Carrera's original 1617 suggestion contained an array similar to Janus chess, but had the R+N mover on the same side of the board as the king. More recently Aberg's variant of Capablanca Chess has used a similar arrangement, but with free castling. (The king and rook can interchange with each other anywhere along their castling path.) However Janus chess seems to work pretty well and maybe a variant with two R+N movers would as well.

Changing the subject slightly, In my view variants the 10x8 variants that move the minor pieces in closer to the middle of the board have sharper and more concrete opening play. Where the minors are further from the center like in Embassy or Gothic chess you often have to spend another move to have them properly developed, which slows the opening play down somewhat.