[Galaxy Note 4 Android Development (Snapdragon)] mminbcn:
I answer my own question with a workaround to the problem that I had that I could not encrypt the device with the rom from _alexndr.

How to install Android 5.1.1 + xposed + device encryption

Install (official odexed) stock room using Odin. It can be found http://www.phonandroid.com/forum/topic-t131379.html or https://mega.nz/#!KgVBVTLJ!xoY38eeJaP13jDZj65g6GeqCDJ5Ya4-2wAWAy7CbwRU

Boot rom and encrypt device

Flash CMW or Philz_touch_6.59.0-trlte.tar.md5 (these recovery tools cannot delete the encrypted user data, so you can proceed wiping user settings and the encryption will be kept)

Reboot (maybe not required)

Download the Deodexed Rom by _alexndr from https://www.androidfilehost.com/?w=files&flid=31222 ([ROM][N910F][ALEXNDR] ★ COH4 / POF2 ★ DevBase, Multi CSC, Safe De-Bloat) - explanation is at http://xdaforums.com/note-4/snapdragon-dev/rom-bob4-devbase-multi-csc-safe-bloat-t3033881

Extract options.prop from N910FXXU1COH4_Deodexed_alexndr.zip and edit it be like this:

#

# DevBase by ALEXNDR (_alexndr @ XDA)

#

# Configuration file to allow customize the installation

#

# I agree to use any part of my work to create more advanced custom ROM,

# but it would be great if you add me to the credits

# Enable init.d support while running stock kernel. Allowed values:

# 1 - enable init.d support, 0 - do not enable init.d support

init.d.support=0

# Enable some hidden features (e.g. call recording) by adding <CscFeature> entries.

# Allowed values: 1 - enable hidden features, 0 - do not enable hidden features

csc.feature.mod=0

# Take care of security-related system files if there are any (SuperSU PIN, Avast Anti-Thelf in root mode).

# Allowed values: 1 - make a backup and then restore at the end of installation, 0 - skip backup

security.files=0

# CSC Selection. Allowed values:

# KCSC - Keep current CSC, recommended in most cases (automatic selection or copy your current CSC contents).

# You can force the use of natively supported CSC by typing (use UPPERCASE!): ATO, AUT, BAL, BTU, CYO, DBT,

# ETL, EUR, ILO, ITV, LUX, MEO, MET, NEE, ORX, PHE, PHN, ROM, SEE, SIO, TPD, TPH, XEF, XEH, XEO

CSC=KCSC

Copy both N910FXXU1COH4_Deodexed_alexndr.zip and options.prop to the root folder of the SDCARD

Flash N910FXXU1COH4_Deodexed_alexndr.zip

Boot and install XposedInstaller_3.0_alpha4.apk (if you install the latest one from the Xposed website, it says that this SDK is not yet supported)

Install the Xposed modules you want, enable them and reboot (Wanam Xposed, GravityBox[LP],AppSettings,BootManager,Greenify, LPThemer, LightningWall, UnbelovedHosts, Xprivacy, etc..)

Some Remarks:

- I believe that Custom bootloader (like Philz Touch CWM, cannot wipe/deal with encryption partitions. In case you want to work with them, flash with Odin the stock one, and when finished reinstall the custom bootloader.

- Deodexed rom means that the Odex file (like a cache/bitcode that is what is executed) has been removed from the .apk. This means that during the first reboot all caches have to be generated by the phone and it takes some more time to boot. Once booted I don't think it is slower.

- Dalvik is the old Android runtime, and it uses the Odex files. The new Android runtime is called ART and instead of Odex it generates ELF files.

- Roms ending with BOC5 are based on Android 5.0.1, and I'm not sure if any rom (Deodexed/odexed) works with xposed yet

- Roms ending with COH4 are based on Android 5.1.1, and only the Deodexed ones are compatible with xposed as described above

- I use texdroider_dpi to shrink and fit more objects in the screen. I configured a dpi of 480. Then I used AppSettings to define one by one all stock Samsung apps to the original dpi of 640.

Thank you _alexndr for your great Roms!

We all wear you in our pockets :)