Spent quite a long time with bitcoin-abc-0.16.2 and armory 0.96.3.991 and trying to get it to work.
This combo throws in the bitcoind log.
2018-01-04 21:34:48 PROCESSMESSAGE: INVALID MESSAGESTART version peer=0
However, bitcoin-abc-0.16.1 and armory 0.96.3.991 allows the connection to happen:
2018-01-05 07:11:02 receive version message: [127.0.0.1:34586] Armory:0.96.3.991: version 70012, blocks=-1, us=127.0.0.1:8333, peer=0
Just a heads up to others. I believe something changed in the bitcoin-abc repo around 12/3/2017 surrounding this PROCESSMESSAGE output.
Thanks. This somehow floated past me. I'm waiting for more reports but it sounds like running 0.16.1 may be the ticket. I took a quick look at the commits. Nothing jumped out immediately but I didn't take a close look. This is an example of what goatpig was talking about when he said that there's no guarantee Armory will support Bcash.

People can always try their luck with Unlimited too.