It's not a matter of being close enough, it depends on where you target. Close to your character, the projectiles spread. Away from your character, the projectiles join.
Also here is another tip for all the noobs.
When you use LMP or GMP you will see the sheet dps decrease but it actually increases and heres why.
LMP adds 2 additional projectiles. Therefore what ever number your dps displays is actually that number multiplied by 3.
GMP on the other hand is ur dps number multiplied by 5.
So all the fart naggles who think lmp or gmp is a waste of time, you are screwin urself.
Well, that only apply for multiple targets. So for single target bosses and uniques it is actually smart to drop chain and LMP/GMP.
Wrong again. If you get close enough all your projectiles will hit the mob.
Dps is calculate by cast, not by projectile, they specifically include the number of projectile in the dps output. The dps won't change because of the number of projectile, it will change only because of the bonus or malus attached to a skill and the support gems attached to it.
Does anyone have update on his current links?
Someone posted a spoiler but the links are wrong, he doesn't use discipline he uses purity/determination/haste and bm grace