In reply to johncoxmysteriously: As we're trainspotting....
Power, not Doubt.
Pretty sure that he originally gave Liquid Amber 8c.
As for The Joker, I remember him being quoted as saying that it was at least as hard as Dominator, which he and Mr Moon reckoned was Font 8b (and then Fred Nicole did it, reckoning Font 8a+).
When Moon repeated The Joker, OTE quoted him as saying it was 8a, and that the direct start (i.e. The Ace) would also go at 8a (though he didn't do it).
But as you say, if Mr Smith hasn't done it yet.....