Best Stable ROMs for 2015? Multiple Partitions on 64GB Card?

Hi Ubernoob here at least for tablets. I am trying to do my first root and install the best stable ROM released thus far 2015.

I guess I need clockworkmod is there a new version?
I really don't know all I need I see a bunch of thread that's are about 3 years old....

I mainly want to install an ide and learn android app programming.
I want newest version of flash support for a good browser.
I plan on partitioning a 64gb micro SD card to act as 3 smaller partitions
16gb swap 16gb ext2 and 32gb fat32
I want Linux dual boot maybe?
I would like to change lenovo splash screen to custom art.

Any suggestions?
Would I run into problems like not being able to mount tf partitions? Where should all my Roms be stored on micro SD or main 16gb?