On the Final400, it's pretty much follow your instinct, because there are so many variations. Just pick your route as you go, look around, and decide what is best. If I were going, I'd try to look out for any rocks covered with black ice -- there can be some. If looking up from the bottom is too intimidating, take the traverse (aka the "Easy Walk-off"), but beware, the first 20 yards beyond the start of the Final400 can be deadly if it is covered with hard snow and ice. Otherwise, it truly is easy.
There is a post listed in the "Reference" forum -- "Important Whitney Links", and within that at the top, Mountaineers Route info and links
Some of the links no longer exist, but the ones still there are definitely helpful.