Obviously you got options,
1) you can use the HS3 wired in single coil which you can get more output, from this low powered pickup.
2) heavy blues, as a humbucker only, still maybe a bit weak.
3) true velvet.
I’m intrigued with a hot single humbucker in the middle position like the Sugar Chakra, lowered down a bit to give you more picking space in the middle of the picking area of the guitar. HSH configurations minimize your available picking area. Tone changes on where you pick along the strings, pickup heights, and magnetic pull on the strings.
If you plan to split the humbuckers in the 2 & 4 Position, a True Velvet or FS1 would work, especially if you can get them wired in hum cancelling.