The big FAQ updated the table for organised play.
A lot of players will use the organised play guidelines for all their games. If you don't then there are no such limitations on you.
Otherwise, most games fall into the 1001-2000 point range, so up to 3 Detachments, and probably more significantly, a limit of taking each datasheet up to 3 times (i.e. maximum of 3 Ravagers).
No special allowance for Raiding Forces - essentially they are an option for Narrative Play, but not a great option with the 3 Detachment limit. Battalions not give 5 Command Points, so even less incentive for Raiding Forces.