This could be found with a little searching.
I'll play anyway.
I have put together many runs, from Silver age to moderns. AF15,ASM 1-700, Silver Surfer 1-18, Vampirella 1-113, and currently working on Creepy 1-146 ,and Eerie runs notably.
Needless to say I'm a run collector.
I have found that getting the keys first and foremost is important, reason being the keys are expensive and if you wait longer they they are much more expensive. The filler books usually stay at relatively the same price. So there's my , and it has worked for me.
Happy run collecting, it's usually that one filler book that's a pain in the A to get.