In have a DSL40 with an Invader which I love in that amp. I have built a new plywood extension cab for it, for a total of a 2X12 set-up....One in the amp, and one 1x12 cab.
Love the Invader, and wonder what could go well with it, yet in a separate cab.
I dont neccesary want one speaker to dominate over the other, but more blend with it, adding different frequencies for a more 3D tonality.
Mostly Les Pauls are played through it.
70's hard rock, 80's hair metal, and blues rock vibe..... Singing sustain and leads.
I was told by WGS Reaper HP is a decent combination.
I bought from the used bin and it was one option.
I'm not perfectly sold on Reaper HP. I have way too many speaker mixings.
Cab allows me to play single 1X12 at a time and I'm OK with that for now. I play super LOW volumes.
But I may go all out, either ALL Invader, or ALL Reaper HP. I'm deciding on tone which I prefer more. The Reaper HP has more of a CLASSIC rock flavor that I've grown to love over the decades.