People don't use click to get around the character limit here. THey use it because /castsequence is a straight up loss of dps. There are tons and tons of posts about this guys, and people have done an incredible amount of testing. Please do some searching. Because of the way /castsequence works (waits for response from the server before moving along) you are losing time equal to your lag when you use it. People have done extensive testing with

/cast lightning bolt
vs.
/castsequence lightning bolt, lightning bolt

You would expect these to be the same right? wrong, because of the way castsequence works. So use click. Castsequence is garbage.