> it can be terrifically difficult to line up multiple simultaneous offers
I've found that too. It seems like even if you apply at the same time, companies move at a variety of speeds. But there are things you can do to help align the offers temporally, at least a bit.
- At the start of each process, ask how long the process will take (how many interviews, number of weeks from start to offer). They'll generally tell you. If you do this for every company, you have an idea of which companies are fast and which companies are slow.
- The fast companies can be slowed down, a least a bit. It's Thursday and they want to schedule an interview for Monday? Say "Unfortunately I'm not available Monday to Wednesday next week, would Thursday next week work for you?" Answer emails the next day, or if they sent you one in the morning answer in the evening "after work".
- The slow companies can be sped up a bit. Firstly, ask for interviews sooner, they might go for it, who knows. If you get an offer from one company, send an email to all the other companies that you have an offer but you'd like to get their offer as well, that might speed them up.
None of this is guaranteed to work but it's worth trying.