I like OHPW, I wouldnt call it the easiest, but you can make some up and it will last a long time with just 2 gliders. we feed 10 gliders so it takes making bigger batches.
A small container of Wombaroo powder will last 2 gliders awhile. a large container will probably last to long. buy a gallon of raw honey $40, some eggs and bee pollen and you can make up 3 liters, put in freezer and you are set for a few months.
Then add some fruits and veggies, I use critterlove website suggestions. I buy low cost frozen veggies then just mix together in a Tupperware container and that will last you a long time.
Buy some fruit, cut up and freeze and your set again for awhile, same with watergrass and other leaves.
the setup process takes awhile, 1 hour for ohpw 3 liters, 30 minutes for veggies, and about 3 hours to cut up fruit, but once its all made up and frozen its just 5-10 minutes a night to make up dinner and put in cage. with just 2 gliders you should be able to make up enough for one month at a time.
with 10 gliders I make up 4 batches of Ohpw 4 liters, and a double helping of fruits and veggies about 2 2.5 gallon tupperware containers.