Hello there apinya24!
I moved your thread into the root forum for your device as you are rooted
As far as increasing the RAM for your device, I don't think that is possible. A device comes with "X" amount of RAM and is not able to be increased without replacing components in the device. I hope I understood your question correctly
And as far as removing bloat, I would suggest getting Titanium Backup from the PlayStore, then if you can swing it, buy the ProKey for TB which will allow you to first freeze the suspect bloat apps. If your phone acts fine with the app frozen, you can backup the app, then remove it. All with TB
I am not familiar with your device enough to tell you what is, or what is not bloat, but like I said, TB is a great app to use for freezing, backing up, or removal of system apps