Unexcepted and Elixr are 8/1 and 16/1 TWAR. Probably the best way to go in view of unknown targets.
8/1 Is rubbish though. You've lost all your margin. If you e backed envoi allen at 10s then unexcepted any race @8s you've just halved your price of both.
Where as 25s is a fair price.