I don't think there's anything combo-licious you can do with dredge in super block. It's more about abusing synergy, getting value and having access to more cards by putting them in your graveyard. Here are some card suggestions that might be useful:
Reanimation (once you've dredged things there): vigor mortis, obzedats aid, debtors knell, immortal servitude, entering
Things you want in your graveyard as they have an effect there or you can get them back: firemane angel, cards with scavenge, creature for varolz, pyrewild shaman (so you can get back), jarad (so you can 'draw' him, rot farm skeleton, eidolon cycle
Cards that want a lot of creatures in your graveyard: svogthos the restless tomb, golgari grave troll, dimir doppleganger,
Cards that want lands in the graveyard: life from the loam, deathrite shaman, drown in filth,
Putting your own dredge cards in the graveyard: glimpse the unthinkable, chronic flooding, sages row denizen, balustrade spy, breaking, pilfered plans, deadbridge chant, grizzly salvage,
Regrowths: dirty, undercity informer (good to get your own dredge creatures in the graveyard), wildwood rebirth, treasured find, codex shredder, izzet chronarch, golgari guildmage
Hope this is useful,
Alf