I would suggest configuration using "Warm Standby" for production server and standby server (that with no delay) and based on created logical connection (configuration of two servers in "Warm Standby" seen as one logical connection) I would create MSA replicating into second standby server (that with 4h delay).
Yeah, that would work, too! ;-)
I've had intermittent problems at a couple recent clients where the 'switch active' command has been very finicky (eg, fails to complete the switch due to a stray/missing network packet) so I guess I've become a bit gun shy with recommending warm standby.
I thought I'd seen Luc Van der Veurst do a write-up on an environment where he'd replaced all of his warm standby configs with MSA configs ... and how he was able to perform his switches faster with MSA than with warm standby. I can't recall/find where that post is (assuming I'm not imagining the write-up) so perhaps Luc will see this thread and jump in, eh ...