dome rings combining with chimney brick

[smithgardens]

we have started laying the first layers of the dome and have choosen to build the chiminey with an arch design. for the layers of brick that intersect with the chimney bricks, is it best to custom cut each of these bricks to fit in line with the dome? or is it best to build the dome separate from the chimney? the degree of tilt of the chimney arch and the cooking dome are different and prove to be a little difficult in lining them up without doing some custom work.