Solid...although, the Morgasmatron won't do much for you on dynamics. However, it's a killer dual filter, with roots in the Korg MS-20 pair, albeit massively expanded in functionality. For ambient-type work, it's a damn good choice to keep timbral content shifting in neat ways; should play nicely with the Rainmaker. The Jellysquasher is probably what you meant...however, I'm not 100% sold on keeping dynamic functionality in the modular. You might find that there's some outboard choices that'll offer a better result.
Instead of the Jellysquasher, consider adding some sort of complex oscillator, both as part of the voicing and as a possible audio modulation source. Sticking with Intellijel, if you can source up a used original Rubicon (also 18 hp, the new "II" version is 20), that would kill. It'd give you some very complex FM capabilities via its thru-zero modulation, as well as lots of complex crossmod potential.