Sign Some help needed :/ Anyone ?

So I recently brought up a old nexus 4, the only problem in it is that it has some digitizer issues because of which the below 55px are dead that is the nav keys are dead.
.
So there are many alternatives for it like Pie controls but the one I liked The most is Mipop(you can google it up)
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So the problem is that it is a MiUi Rom feature, is there any way I can use it up on other roms
Any help?


Also as I am new can someone suggest me some light roms and a Good Kernel for better BATTERY LIFE.

Your help would be appreciated.
Thanks
Haters gonna Hate
In short, software is eating the world :Marc Andreessen


Micromax Funbook P300: CyanBook Jellybean(Android 4.2.2),Linux 3.0.3@1.2 Ghz
Samsung Galaxy Pocket: (Retired) Blackstar Rom(Android 2.3.6),Stock Kernel@832Mhz
Samsung Galaxy Y: (Retired) MiniRom TouchwizUX(Android 2.3.6),Hells Fusion #50@832 Mhz
HTC Explorer A310e: CyanogenMod 11(Android 4.4.2) ,Linux 3.0.101@ION@600Mhz