lol, i can't just quote myselfsomething fairly critical to bear in mind is that we do not actually know the dietary requirements of tarantulas... so everything you hear about high this is good or low that is bad or whatever is most likely speculation
something we do know, though, is that tarantulas can be raised from egg to grave, fertile, on a diet of petstore crickets
even people's anecdotes don't really tell us anything, as there is such a hideous number of variables when it comes to nutrition and metabolic processes and stuff.
another tactic would be to track down scientific accounts of what tarantulas eat in the wild. this would probably involve examining the debris in burrows as you can't exactly look for parts of bugs in a tara stomach, as you can do with other animals. i don't believe i have ever read about a tarantula in nature that eats just one bug to the exclusion of anything else