Capped gear haste is 256/1024 (25%).
Capped magic haste is 448/1024 (43.75%).
Erratic Flutter is 307/1024 (29.98%).
Capped gear+magic haste is 704/1024 (68.75%).
Capped gear haste + Erratic Flutter is 563/1024 (54.98%).
Total delay reduction = (1-haste)*(1-DW)
You can rearrange this equation to isolate DW: 1-(total/(1-haste))
Plug in 0.2 as your total delay reduction, use whatever quantity of haste you have, and solve.
Capped gear+magic: 1-(0.2/(1-0.6875))=0.36
Capped gear+EF: 1-(0.2/(1-0.5498))=0.5558
DW3 is 25% DW, so assuming 1200 JP you're looking at 11 DW to cap with capped magic haste and ~30 DW with just Erratic Flutter. Best to err slightly low, rather than high, in order to avoid losing too much TP/hit.
Samba with capped magic haste puts you well past cap even with no DW gear.
None of the sets in the OP exceed 11 DW. Adhemar+1 and Suppa is 11, Reiki and Eabani is 11, Adhemar and Suppa is 10, Suppa and Shetal is 10.