3 step 3 step 3 step!! Lol. Look here's my take. You are sick like we all are/were, and the best chance to do things properly is what you need to have. I know it sucks to have the bag, especially the loop ileostomy it can be a struggle. But all the time you can give for those areas to heal is crucial. You don't want to be in a position of dealing with unnecessary infections or other issues.
Get those albumin levels up, get your weight up, get the j pouch placed and then give it a few months to heal. Then go for takedown. Trust your doctor on this one and don't be in a rush. Time flies and though it seems like forever, that extra time in between surgeries will go by before you know it.
And follow all your post surgery instructions to the letter! Watch your fiber/bulk intake between surgeries, you don't want a small bowel obstruction. Take all your medications properly and on time. Stay away from coffee, soda, cigarettes (if you smoke), nuts/seeds, etc...
You got this and can't wait to hear from a healthy you when this is all done!