Hey Jugrina,These are my settings for printing (Infill is of course dependant on what kind of properties are you looking for). I still get some stringing between the models, but the printing is really clean, almost as good as rigid materials.

https://imgur.com/a/vmKVWoP
Support: 30°
Material: FLEX-based filament
Nozzle diameter: 0.4 mm
Layer: 0.19 mm
Quality: Default
Infill: Solid
Fan speed: 100%
Seam: Normal
Surface layers Top: 8
Surface layers Bottom: 5
Max. wall thickness: 3.13 mm
First layer Density: 100%
First layer Print speed: 50%
First layer Flow ratio: 100%
First layer gap: 0.37 mm
Raft Enabled: Yes
Raft layers: 4
Platform-raft gap: 0.28 mm
Raft Density: 100%
Raft Print speed: 100%
Raft Flow ratio: 100%
Print speed: -50%
Extruder flow ratio: -3%
Top layer infill (%): 100
Bottom layer infill (%): 100
Extrusion temp.: 233
Platform temp.: 65
Retraction speed: 34
Retraction distance: 0.8
Support Density: 2.50 mm
Gap XY: 0.36

I used raft, becouse the model is really tall and needs extra support. Also i have a larger XY gap, becouse i needed to remove the raft - you are gonna have to play with that.The bottom was still ugly in the end so i just cut it on a table saw.Also, always have fan speed on MAX. And printing speed on lowest possible. The other most important thing is retraction speed and distance.Hope this helps you.