You ought to have a look at some of selfbuilt's reviews and runtime graphs. I was just looking at his Quark review, and he happens to include the D10 as one of the many comparisons for that particular review.
https://www.candlepowerforums.com/threads/234960
I don't have a D10, but from reading his review (which you can read for yourself and draw your own conclusions), here is a rough summary of what you can expect from the D10 in various battery/power setting combinations:
1xAA Eneloop NiMH - Max output of 56 (see
NOTE below) (59min to 50% output), Medium output (~50%) of 32 (2hrs 19min to 50% output)
1x14500 Protected Li-Ion - Max output of 76* (1hr 12min to 50% output), Medium output (~50%) of 35 (2hrs 39min to 50% output)
* drops to 62 in ~18 mins, then stays mostly flat
1xL91 Energizer e2 Lithium - Max output of 56** (1hr 39min to 50% output)
** stays in mid 50's for ~1hr, then drops quickly and steadily to zero for ~1 more hour
1xAA Duracell Alkaline - Max output of 56*** (23min to 50% output)
*** drops sharply to ~8 in ~30 min's, then gradually and steadily to zero over ~90 min's
NOTE: selfbuilts power output numbers are just relative numbers; they don't have any absolute meaning (e.g., they are *not* lumen ratings). Rather, he uses a consistent scale for his light metering equipment across *all* his reviews, which is handy because it allows you to make relative power output comparisons across all of his reviews.
FWIW, just my own personal opinion is that the Eneloops look like the winner to me. Yes, you will get more output initially from a protected 14500, but it drops pretty quickly to about the same output of an Eneloop, and the overall runtime is very similar. Given the safety margin of NiMH's over Li-Ion's, I would probably run LSD NiMH's in the D10, especially if I was unfamiliar with the safety issues associated with Li-Ions.
Good luck.