I typically spend 2 days in EP myself. I do FW from RD until early afternoon, and spend the rest of the afternoon/evening in WS. Same for both days. WS rarely has lines for anything (and as mentioned above does not open until 11:00), so use RD to take advantage of shorter FW lines, and then enjoy a much more “unstructured” PM in WS. If you plan on taking mid-day breaks, do FW before the break and WS after the break.
Get FPPs for Soarin’ on day and TT the other day, then hit the one you DON’T have FPPs for right at RD; that way you’ll be able to do both on both days. The only thing about WS that requires some advanced planning is which of the live shows you may want to see. Not all shows perform every day, so look at the schedules for the two days you will be there, identify the shows that you want to see, and then fit the pavilions around the show schedule.
I just reread you post, and saw that you are leaving tomorrow, and have made no mention of FPPs. Have you made any? If not, the chances of getting them for Soarin’ or TT this close in, during a busy season, are very slim. In this case, you need to hit Soarin’ RIGHT AT RD on one day and TT on the other. There will be lines for pretty much everything in FW, and they will build quickly. I would plan on being at the gates AT LEAST 45 min before they open; if you get there “right on time”, there will be hundreds of people ahead of you waiting to get through the turnstiles - this could significantly impact your waits for the first few rides.
Are you planning any TS meals? Do you have any ADRs? EP has arguably some of the best food in WDW, but walk-ups for most to the TSs are difficult to come by and usually require an extended wait. There are many good QS options as well, but you’ll be missing out on a major aspect of EP without a TS meal or two.