Jaysus, that's more information than I could handle in a whole shift !
Now that I've read it six times, makes sense . As the triple is already above the A340 and also behind and faster, then its a hell of a lot easier for ATC to assign FL320 to him.
Otherwise, with the A340 climbing slower than a wet wednesday, the 777 is going to have to be vectored around him, and this sounds like a Brecon-Strumble example with not a lot of room on the airway.
And in essence, that's why he gets it. If the 777 was under him, most controllers would slap on a rate of climb restriction and level him at 300.
I guess the exception proves the rule.