Double trouble can also be played with two Kalistas, but taliyah is still stronger.
Warwicks augment (ravenous hunter) is quite strong. It was played a lot during the weekend's tournament.
Riftwalker (kassadin) is a little weaker, but still can get you to top 4 if you hit it. (6 bastion comp)
The boss (sett) can be played Ionia (the standart kaisa+yasuo) or with similar build to Double trouble Taliyah. https://tactics.tools/team-builder/LJSZ.DbljVG.DZKLBGCNkAWC6XUYmEqa
Don't know about Swain or Galio augments, but both could be good in Multicasters reroll comps.