Allview v2 viper x+ root process. - Android Q&A, Help & Troubleshooting

Ok, so I don't want to continue with this after I get some specified things in order to pursue the root methods.
My phone is Allview V2 viper x+ 3 gb ram bla bla (http://allview.ro/produse/telefoane/viper/v2-viper-x-plus-gold.html)
I'm backing up now few things and after that will backup the system files like recovery, imgs and more so, just for to be sure I have some back up in order to get it back to life if something gone's wrong.
I have 2 problems to solve with this phone.
1. After I changed my sd card to be the default internat storage for apps, everytime I try to install some app from market it's says something about hardwer is not compatible or something like this, but If i'll download the apk from some site (same apk) is working, well this is the first problem and is unsolved.
2.I want to have the phone rooted, I saw many posts with this method of supersu beta root and I have to flash some recovery img (I'm always trying and I see if is working, but I have a lot to save from my phone, so I'll have to wait to finish the full backup, reset the phone, get the sd card off and so on).
I tried to search a good version of TWRP for my phone, but I don't find any good compatbile.
My question for you is :
1.Did anybody had a successful root with this phone?
2.Which method is better to root an marshmallow? (6.0)
3.There is some recovery of twrp compatbile with this phone?
4.Does the ota update will work after the root process? (because I'm thinking that they could have some update to 6.0.1, but Idk when).
##Update##
I came back to previous version of 5.1 and root it and then I'll try the method from here with flashfire.
http://www.howtogeek.com/192402/why-androids-ota-updates-remove-root-and-how-to-keep-it/
Click to expand...
Click to collapse
##Update-2##
Failed every method I tried.
- Failed installing custom recovery carliv, cwm, twrp (all failing, is not booting after flashing custom recovery, the only one who works is that carliv touch but if I install it, will not boot anymore)
- Failed kingroot (suppose to have some 6 method of rooting one click root)
- Failed flashing supersu, not working without a custom recovery .
- Tried to search for some custom rom to install with carliv, but I didn't find any good, all had errors that I didn't find to solve. and is crazy that I can't root the phone.
Note : What method remains?
If someone know..
##Update-3##
After many many unsucessful custom recoverys, successful bootloader unlock and many resets, didn't get any luck.
I'll remain on 5.1 till I have a clearly method of rooting the marshmallow without having to change the custom recovery, or maybe till I find a good custom recovery that works with anything I need.
Or till they update the android 6.0 to 6.0.1 (I saw that they have some root access option).
Maybe someday someone will text here with some method or similar, so I'll look here everyday till I find a way ;3
Ps. : Even if is a gionee s plus, the methods I saw for it, didn't worked aswell.
Cya.
##Up1x##
Tried this too and voilla .. ..
Another error ^^
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##Final Update (Can close this)##
After a lot of of of of searching and mental stress and a lot of digging, I finally find a very one and good solution to get supersu flashed by a custom recovery.
For those who have problems like me and have same phone (Gionee Splus), follow this guide : https://atozhacks.blogspot.ro/2016/08/gionee-splus-marshmallow-philz-touch.html