the combination of short chainstay, chainring size and amount width in an 8/9/10sp cassette makes sharp chain angles, which makes it more likely to drop the chain.
So my understanding is that many chain drops are essentially caused by a horizontal wave propagation along the upper chain starting from the cassette and moving towards the top of the chainring. Besides countering the causes of the wave propagation (thinner chains, shorter distance, having a cassette in the first place) the primary approach is to dampen the wave energy by installing something to one side or another. Such items include front derailleurs, one or two chainring guards, a chain keeper (either
cheap or
stupid expensive), and
goofy looking rollers).
A front derailleur won't mount onto a tikit without a braze-on being installed, so it's out. Chain keepers are possible but all the current designs attach to the seat-tube, which the Tikit doesn't have. The rollerkit has similar attachment issues. So it seems to me that the main option would be to get a single chainring guard and snug it up next to the chain. Unfortunately the Tikit can really only have a guard on the outside. And 60T guards are extremely hard to come by (I think I know *all* of the sources, and there ain't many). And expensive ($50-60 at least).
best you can do is try and get the chainring centered to the middle of the cassette or with a slight bias on the side it drops most.
I've got it on the inside which isn't really centered. I might pull it to the outside where it'd be centered better but was worried about the effect on my pant legs.