I'd probably splinter with the S hand after a 1♦ opener. You get to describe the key features of your hand in one bid and partner can judge what to do. After a 3♠ cuebid, a 4♦ bid will suggest good trumps, since S can't have many points in the majors and couldn't cue ♣. Seems like good trumps, short ♥, not much in ♣ is enough for N to make some move.
(1) inverted, 10+, 4 card support, no 4 card major
splinter is certainly ok, most likely best, since you tell your whole story
in one go
(2) tough, 10xxx is a stopper, one also has a spade stopper, and a club
stopper, so 2NT it is
(3) ...