some more feedback on 21683 sense city for those of you interested.
after xda_Uc was getting 63 mb using CHT 2.0
installed and switched to Spb Shell and now ram is 107MB
strangely when i was using titanium ram was in the range of 101-103...
much faster build so far ....will know other issues only after a few days of usage...(or never at all)
or till the new version comes out whichever is earlier ...LMAO