I play a "normal" TnT and not some artifact prison, and its also a very bad matchup for Sui.
However to answer your question, if I look at the last Dulmen results, I would give Sui a try, all the keeper, MonoU Control matchups should prove quite interesting and winnable for Sui.

Chalice also works extremly well against Sui, set at 2 counters to keep those nasty disruption spells away, or at 3 counters to deal with nearly every creature they have, not to forget the Necropotence some versions play..