For the low 40s I'd suggest 2-3 man parties near camp bluefog. Kill birds and incap sphenes can net you about 20k/hr without fatigue.
Raptors are only really good sp (40-50k/hr) when you can do small groups of 2-3 people but you can only pull this off if everyone is 46+ and having an archer helps.
The best SP for the low 30s is leve parties by far. A static group doing two rounds of 8 leves can take you from 30-40 in about 3-4 resets.