Benzylic and allylic carbocation stability order Most books I have read stop at this order : 
Benzylic > Allylic > Tertiary > secondary > primary  
However If I want to compare tertiary, secondary and primary benzylic and Allylic carbocations what will be their stability order?
Yes tertiary allyllic carbocation is more stable than secondary because no.  of electrone donating methyl groups are greater than secondary (in tertiary 3 methyl groups  while in secondary  are 2) so they decrease  electrophilicity carbocation but it still it remain electrophillic.