True, the combined tempo and duration are exhausting, on the cello maybe more so. Alternatives, depending on the available instruments and the desired sound:
A xylophone. Temple blocks. Woodblocks. Other idiophones.
If the middle note of each group of 3 can have a different height, like 1 or 2 octaves higher, or a third lower, then a piano plays it easily.
Cellos or violas play ricochet sextuplets, in 2 or 3 groups that alternate 3 notes on the same height per bow stroke. Amateurs may not be used to play ricochet but it's really easy and fun. Better several instruments for a decent
forte. Accurate timing isn't difficult.
Cellos play two notes per beat. Castanets, a snare drum... make the sextuplets. Easiest.
Cellos play two notes per beat. Violins or violas make the sextuplets by ricochet col legno at any constant note except empty strings. Fun, but could be tiring. Better several instruments, and then you hear them with varied propagation times, like rain. No true
forte, but our ears perceive better the percussive sound.
I don't play percussions, hope a percussionist passes by.