I always use a different variation, everytime I go grocery shopping I get different veggies, But here's how it breaks down:
I use Cricket Crack as a constant dry gutload and I use a variation of 5 different fresh veggies each week. I'll usually supply enough food to last my feeders for 3 days. I found that to be the standard atleast for me any longer and the food starts to mold. I mince my combination of 5, for example this past week: Collard greens, Dandelion greens, Parsnip, sweet pepper, and squash. Then after its all been tossed together I put enough food to last the feeders 3 days, rinse and repeat the process until my weeks supply of feeder food is gone and I go out and get a different variation on veggies.
The 3 day thing might take awhile to get down, atleast it took me awhile. There is alot of factors that play into it. What type of feeder is it, how big are the feeders, and how many feeders are in the container.
-I Just replace the cricket crack whenever it gets low. Crickets attack the stuff like it's an invading army but always seem to leave a very thin layer remaining. My dubia on the other hand devour it and every time I check on them I add more.