I read a post recently which is now some years old by Les McLean where he gives the following for WT papers in general in LPD: 1+2 neutral warm brown and 1+1 very dark brown to brown black. No examples shown in his post but to say "very dark brown" has to mean something. Might be worth a try with LPD

In my own experience Ilford WT paper in Ilford WT developer was only a very subtle brown. In fact as I was doing a run of prints with this combination I had difficulty seeing any brown tones after I had done a few prints until I compared prints done in MGIV with MG developer and then the difference was clear.