How do I avoid friendly fire?

[Norfleet]

The new patch appears to greatly reduce friendly fire, because accuracy of shooters appears to have gone up greatly.

For instance, I was amazed to watch a battle where a Fire Flies caster actually LANDED ALL OF THE SHOTS INSIDE OF AN ENEMY SQUAD. It was simply amazing, a miracle. He HIT SOMETHING. Usually when a mage casts Fire Flies, it's a miracle if he even manages to wing somebody, let alone hit with all of them. But it was no fluke: He did it over and over: The shots were actually hitting the targets, as if he was actually AIMING at his opponents, rather than drinking heavily while casting spells.