I've done 5 out of 6 of these if BTM before its closure and extensive refurbishment counts.
Big Thunder was pretty dull last time I rode. I always think it looks like an RCT coaster made real (bank, turn, transition back to flat, gentle drop, level out etc.).
Oblivion: TBH can't possibly be as bad as Krake. I wonder from the POV whether it might be a better layout than Baron. I certainly doubt it's as good as Valkyria though, and I wouldn't put that through in this group either.
On my only visit to Parque Warner to date, I thought Superman was very good. It's fun, forceful and far better than Dragon Khan, and the zero-G roll actually gives you that floaty feeling that the name suggests instead of just shoving you up and sideways like most B&M zero-Gs do. I actually preferred it to Stunt Fall, which I did vote for in its group. Why then am I not voting for it? It just lacks that extra something that would make me go right back round the queue for another go straight away.
Saw is the most variable coaster for comfort I've experienced to date. Occasionally it's quite smooth and pleasant. Normally it's a torture device of the sort that befits its theme, bestowing a nasty bout of Gerstache upon you after ripping into the last dive loop at a horrendous pace. Even at its best, it's no competition for most of this group.
Troy gets my first vote. It's not a relentless succession of great hills and corners like Wodan, going slightly off the boil in places, but its length and generally high standard put it second in my admittedly limited experience of GCIs. It wasn't helped when I first rode it by having a few spots of that GCI 'head rattle' as I think John was alluding to, though on my next visit I think all of the sections affected had been renewed to sort that.
The other vote of course goes to The Ultimate. Part of me would like to dock points from it for Lightwater not having enough to do (especially when it's on one train) and most of the ride duration being spent getting you to or from the exciting bits. The first point is irrelevant in what is specifically a coaster poll, and the second pales into insignificance when you consider just how absurd the valley run section and following hills are. Whether by accident or design (probably the former), few coasters can offer that rush and the huge relief of having returned to the station in one piece and without taking out a deer in the process.