EDIT: THANKS FOR HELPING ME OUT
If your're getting bootloops and black screens than there is a bigger problem. Which version of SS are you use? Do you always wipe everything before you flash? Maybe you need to FXZ your phone. There could be something corrupted. I understand your not a noob, but your experience with safestrap isn't a typical one, so obviously you have some kind of unique problem. And when a dev said, this rom only works with SS and you install with boot manager and have problems who is to blame? Simplex works just fine on my phone. And so does Safestrap. There must be SOMETHING that you're missing. What are your install steps from the moment you turn your phone on stock-rooted with no recovery installed to when you boot up a rom?
I've used 2.0, 2.1, 2.10 and 2.11 versions of SS.
Steps are below
1. Install SS
2. Install recovery
3. Reboot - use menu to get to recovery.
4. Backup of non-safe side
5. switch to safe side
6. wipe everything (data, cache, mount system & format it, dalvik)
7. Flash ROM
I follow Hash's instructions here ->
I am rooting 4 Razrs they are all brand new never before rooted or anything. Fresh roots and straight to SS.