I have DW1200s that I recently bought, and while they list a battery offset on their site:
http://www.deatschwerks.com/product...-dsm/1995-99-eclipse-dsm/42m-02-1200-4-detail

It doesn't help me much since I only have v2 link and can't change those tables, so my question is what should I use for the global deadtime which I can change? I figured I would start at 450 based on what I saw recommended for other injectors of similar size, the global % I already have plugged in at 62.5% but if anyone knows a better way to figure it out, or a better # to start with please chime in.

I'd start with about 400 instead. Watch for fuel trims during cruise and idle. Deadtime adjustments matter the most at those. You should be close though. Enough to get it running smooth at least.

Fortunately, you don't have to guess your deadtimes it's something you can actually tune correctly.

http://www.ecmtuning.com/demos/fueltrim.html

You don't have the wizard but it's the same concept using v2.5.