I discovered this is easy to do by combining a few methods - those of you who have ever snowboarded will recognise this. "The Falling Leaf" Technique.

When you are fighting a large NPC such as dev or sib, mlord or bk, sometimes it is necessary to drag them somewhere, away from the side of the screen or to a protal for example. Usually not aproblem at all but sometimes it can be difficult, especially out of a coerner say, as you will be swamped by smaller lordis, saimon, lks and such.

By circling an enemy by the side of the screen once, i discovered that you can avoid fire by doing a semi circle around an npc [i was doing this to avoid the radiation zone].
Combine this with the dragging technique and you can effictively drag an npc, whilst avoiding the fire of all those annoying little bassas.

It earns this name due to the pattern made by your trajectory.