S7 Edge (SM-G935A) - Help to Restore Stock Firmware

I wanted Nougat early rather than wait on AT&T. After flashing a modified AP file through Odin, I changed my mind. Ever since that happened, the phone is slow and inundated with notifications concerning security issues. I tried to restore to factory settings and flashing back to stock firmware...no luck in resolving the issues.

I think I haven't been able to restore the phone to stock because of something related to either my baseband version ending with APK1 or something to do with the bootloader being 'rev 04.' I can't seem to locate firmware files that are compatible with my phone's current software.

I am not really what to search for exactly and I haven't had any luck being able to determine where to locate compatible BL/AP/CSC/CL files. Please help!

I have listed information about my phone and software below, please let me know if there is any other information needed to help me with my issue.
MODEL #: SAMSUNG-SM-G935A
ANDROID VERSION: 6.0.1
SECURITY PATCH LVL: Nov. 1, 2016
BASEBAND VERSION: G935AUCS4APK1
Kernel Version: 3.18.20-7856276-ENG
dpi@SWHD7309 #1
Fri Apr 22 16:24:20 KST 2016
Build Number: MMB29M.G935AUCS4APK1

Security Enhancements: Enforcing
SEPF_SECMOBILE 6.0.1_0010
Fri Apr 22 16:29:47 2016
Security Soft. Version: MDF v2.0 Release 7
VPN 1.4 release 6.1
ASKS v1.2_161011
KNOX 2.6
Standard SDK 5.6.0
Premium SDK 2.6.0
Customization SDK 2.6.0

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