With sextuplets, you have 64 possibilities. Use 8th notes. Only 8 possibilities by triplet. When you write with a pen, it's easier. When you print, it's easier to read, and clearer.
How did you approach it? I have used combinatory logic. There's two possibilities which we can not intrasectly combine, the full sextuplet, and we exclude, the zerotuplet. I use then C equals p over n. It gives me fiftheen, upon which I add the full sextuplet, giving me sixteen possibilities.
I'd come up with whatever felt comfortable as I long as I'm able to articulate properly. Ta-ka-te-ke-ti-ki might work. Or just use what you use for triplets, like ONE-di-da-AND-di-da, for example. Or be ridiculous, like ONE-six-tu-plet-done-now No, seriously I'd stick to ta-ka-te-ke-ti-ki
It is. I would keep thinking RLRLRL (or LRLRLR if you're left-handed) throughout, though - that way notes fall where they would regardless of pauses and such. Makes it easier to manage than having to think different stickings for each one. If this was part of an actual solo or something else, then I might consider different stickings depending on context.