Here is a nice super simple but powerful ranged one bar magsorc build.
Rotation is easy..
crystal weapon into light attack - crushing shock - light attack.
When you need resources hit ultimate energy overload then repeat rotation.
Hits very hard and it will constantly interrupt so deals with arcanist beams and long range interrupts people that are trying to rez.
It's got a small amount of tankyness but should be played at range if preferable as that's where it shines.
Flex spot would be vigor and can replace it with surge for more healing or mages wrath for some great aoe damage when fired at ball groups and is a solid ranged finisher.