Starting .net deobfuscating

[yologuy]

Hello everyone. I don't really know if it's a good place or not for this kind of stuff since all forums seem to be more about release than help thread.
So if it's not in the mentality of the board fel free to remove my topic.

Ok let's start. I'm currently working into a .net dll wich is obfuscated.
To be clear I already did some reversing in .net but nothing fenzy since I don't know .net but only python / C++.

Of course I tried De4dot which in all my previous crack worked very well. And with Reflector / reflexil I easily fix it.
But not this time. So I have to dig a more deeper into this shit

Class name / Method name / String are encrypted, basicly everything is encrypted. You can look this screen, everything is like that
hxxp://img15.hostingpics.net/pics/482373WTF.jpg

So I come here for asking some help about where to start in this kind of work? Coz I'm totally lost. Is there any api method to trace?
Do you have any clue for finding which obfuscator is used? (I don't really know but it's a pretty big plugin 500$/y so they could have implement their own obfuscator it will not surprise me at all)
I can share the dll if needed but I really want to understand this shit. So if you just post me the dll cleaned I will be happy but it's kinda useless for me.

Thanks in advance.