What kind of crummy viola thing is this? Many crummy violas in a symphony, or just one in a quartet? Depending on context, could you change some of your 1/16ths to staccato 1/8ths? (Coordinating many violas that might not be as exact as you need, but for just one that could clean up your score in a hurry.)
I paged through my favorite notation bible, and they suggest beaming across rests by half-bar in this sort of situation, rather than just by beat, so those up-stemmed 1/16th notes that are dangling off by themselves could be beamed in with their compatriots in measures 8 through 12.
Also, in simple time (4/4, 2/4…) "rests in the middle of a beat may be combined as long as the rhythm is straight-forward." So you can combine the two 1/16 rests into a single 1/8th rest in the middle of beat one of measure 8. Looks cleaner. The example in the book is actually that exactly, so thumbs up on that one!
Or, depending on what is going on in other parts, is there a reason it needs to be in 4/4 rather than 2/4 for a few measures? That makes it a bit more digestible.
So, all that taken together, how about for measure 8:
1/16th note, 1/8th rest, 1/16th note, 1/8th rest, 1/16 note all beamed together followed by a 1/16th rest. Second half of the measure the same.