i’ve had mono mini’s and i also found them underpowered. i had them on a light weight hardtail and they were ok for that but would be no where near powerful enough for my full sus.
my mate has a pair of 08 (i think they’re ok) with the servo wave levers and they are more powerful, the thing is though the hopes will have more modulation, a better feel.
i’ve just upgraded my XTR’s on my ransom to the new 4 pot saints and the difference is huge!
hope that helps?