ROMs Need help

[allblue81]

I have an lg optimus m+ lg-ms695 i have rooted and installed all proper apps, and i am clear on how to flash s new rom... Can anyone telk me what roms i could use and what rom may be best to get better performance. Im currently at 800Mhz short bench average 359 long bench averages 450. As of now it lags bad on Dead Trigger and Critical Strike. i havr removed all unwanted apps, what else can i do. How do i increase my Mhz and lower my bench