The matchmaking system however you do it by ladder simply isn't working. We now have the 'new derankers' who just hover in the low 6000 range to get easier fights.

I'm sick of playing people with l3 legendaries, l5 epics, l6 rares and l7 commons. I have at best l2 legendaries, l4 epics, l6 rare (only 1, being lightning after slogging 3 months of card requests t get it there so I can kill the l3 legendaries like WDT and SOMM in one hit!) and l6 common.

I just played someone with l3 MBP, l3 GWC, l3 SMW, l3 WDT and l5 Pope Timmy. How on earth I managed to survive until the final 5 seconds of sudden death I don't know.

The matchmaking system should take into account the NK level and the level of each rank's cards. E.g. the sum of:

NK level
Each common card's level X 1
Each rare card's level X 2
Each epic card's level X 3
Each legendary card's level X 4

I haven't given immediate thought to the exact maths of that, but it should be something along those lines. The ladder and rewards system need not change but the matchmaking at least can then and should end deranking hopefully!