Best cabinet plans for Markaudio Pluvia7HD

Are these drivers hard to drive?

I have SMSL A300 amplifier which is 85W on 8ohms and i get only like 75DB on 40 volume out of 60 on my amp so it means its not even putting out 1watt at such high volume. The pot is also digital linear inside the amp.
 
Just stuffed the cabinets with polyfill around 250g but dont really like how it sounds now tho 350g would be overkill. Will put much less inside.
I tend to have as little damping as possible.
I think the damping ruins the sound. It becomes less of a live feeling.
Too little attenuation can make listening difficult. No control on the cone.
Something in between is best. It takes a little time to get used to it, but it's worth it.
 
Yes it totally killed that "live" tone and bass got weak and some highs were lost. I prefer it without any damping, Or maybe i just dont like damping with polyfill. What i if damp only the sides of the cabinet with something? Would it be different?