How to get to 250 quick

Now my main at 243 (1b combat power )and i only can gain EXP from pop quest and bossing in this cp lvl is getting not much exp?
Sorry for my english

you basically get from 240 to 290 with pop quest. after 290 its almost impossible to get exp. make sure you max your gold bar

Go to dungeon if you go up higher, you can earn a lot of exp more than your think