I'm sorry, but since I'm still getting the hang of this myself, I'll only help with that rounding question. Your average delay should be based on whether it is even or odd. If you look at your delays, they typically are even or odd. They change though, depending on whether there is a GBA cartridge in ur ds or not. An important idea to remember about your delay is its evenness/oddness (excuse the made up words).Alrighty, time for another of my dumb/lame questions:
Ok, so I'm SRing for a Method J Pokemon, seed 52140289. My average delay is about 623.7 (so quick question one, would I round this up to 624?), seconds to get in is 14, and the delay required for this Pokemon is 639. So I brought up Pika timer and...well, got confused trying it last night (granted, 5am isn't the idea time to try SRing when you've been up all day, but eh).
EDIT: Btw, what is a good range for your average delays to be in? I'm finding my delays range from about 15 values, should I try to be more consistent? Anyone?