10/12/14f/16f
or
10/12/16/18
13s don't play well with other close-interval drums. I've had good luck with 10/13/16, though.
GeeDeeEmm
If you're really stuck on the idea that you need the big separation, why not go 10/13/16?
At one show I played in college, I used an 8/12/16 set-up. FOUR inches between! Comical!
I'm obviously rebelling about some notion of having to have the separation. I think it's funny that marketing is now dictating to us that you must have at least a two inch difference to notice. But on the last video I did with my just completed Roger Taylor kit, the rack toms are 12/13/14 with 16/18 floor toms. All five toms sound different from one another, but the rack toms all feel the same. Floor toms will always feel different because they get an almost bass drum-like tuning.I don't know about anyone else but the "big separation" I want is between the tom and floor tom. And it's not just pitch. They feel very different. The last thing I want is a 13 to "bridge" that gap. I could very well be in the minority though. Just giving the OP food for thought.
The 8/12 is weird. Nothing odd about the 12/16.
Not to Dave Weckl in the 80s8" tom is essentially a bongo.
I guess we're not getting any 12/13 love here. I blame Steve Gadd for getting everyone on this kick that you must have a two inch interval between drums for them to sound different. Fact is, if you know how to tune, you can make it happen. We've been doing it long before Yamaha marketed the 10/12/14 interval to us. And everyone seems to forget that in the beginning, Steve's floor toms were only one-inch apart - he originally used a 10x14 and a 12x15 tom hanging from one stand.
If you're really stuck on the idea that you need the big separation, why not go 10/13/16? Then you have a three-inch difference! Of course, if you wanted an extra tom, you'd need a 19" floor tom, and a 7" rack tom.
At one show I played in college, I used an 8/12/16 set-up. FOUR inches between! Comical!