Here's a proposal from a rookie Rangers fan, so please bear with me..., but perhaps Anaheim can save up to 5M in CAP & 4M in salary expenditure and still get something back on Fowler.
I have no intentions to insult anyone with this, sorry if I do.
From what I understand Anaheim would like more wingers but doesn't want to acquire any defensemen.
NYR doesn't primarily need LHD, but I hope Fowler could be a trade chip to acquire Trouba, and this is the motivation from the Rangers perspective.
To NYR:
[Fowler, saves ANA 4M both for this year and the next]
+ [Boll, saves ANA 900K yearly for 2 seasons]
+ [Holzer, saves ANA 700K this season]
+ [either Thompson 650K retained, or if ANA retains 2.3M on Stoner, would save 950K salary]
To ANA:
[Miller or (Pirri + Fast) or (Pirri/Fast + 2018 2nd rounder?)]
+ [Jensen(two-way 600K/150K) and/or Hrivik(two-way 600K/175K)]
+ [Glass, 1.45M CAP & 1M salary for this year only]
Moving Fowler, Holzer, Boll, and either Thompson/Stoner would save Anaheim 6.55M in salary expenditure.
By taking on just one of Pirri/Fast, and sending Jensen/Hrivik/Glass to AHL, the added CAP would be ~1.5M and the added salary would be ~2.3M.
Acquiring Miller, with Jensen/Hrivik/Glass in the AHL, the added CAP sums up to ~3.25M and the salaries increase with ~4.1M.
Depending on the players traded, Rangers may on the other hand even be forced to temporarily send Skjei to AHL, and would probably waive/IR all acquired players not named Fowler.
(Numbers are taken from capfriendly.com)