NOBODY
I agree that the best is the one you're going to fly....
I agree that getting 500hrs multi IF is the best way to get onto a turbine, thats why I said " I reckon twin IFR time is more important than turbine time". but I disagree with your statement that single engine turbine time is a TOTAL WASTE OF TIME. (from personal experience of course). It helped me in the interview for my first airline job, the panel asked me a lot of questions about technical stuff with regard operating turbo props, I understood it instead of having to rote learn it or not having an answer at all. It's just another experience, not one that I would put above twin ifr time but still a bonus. If you have the twin time or are below 1000hrs total time I think it is great fun and good experience.
c ya