Mass pulls: don't do this.

[Ceodore]

Assuming Y is you, let's do a small scenario. Either you're traveling straight through these guys from left to right, or you're rounding a corner, from bottom to right maybe. You have provoke for use off the GCD to keep from having to trigger your GCD, and you have a longer range on provoke than Tomahawk or Shield Lob. Here's a demonstration assuming you don't use provoke.

Left from right


--------------------------------------wall----------------------------------------------
..........................x1...... x2
y---------------------------------------------direction of travel-------->
...................................x3

provoke x1 first, from max distance of shield lob. x1-3 are linked targets. Even considering x2 and 3 are further apart than 10 yalms, buy the time they reach you, they will be close enough together to be effected by flash. Further, x1 will also be hit by the flash, because his direction of travel is to follow when pass him since you've used shield lob.

Around a corner

wall-------------------------------------------
w
a......x2........ x3
l
l
|.....x1........... _----------->
|.................--
|..............|..........w-----------wall-------------
|.............|...........a
|............|.............l
|...........|..............l
|..........|...............|
|.........|................|
|.........y................|

Shield lob x1 at max range, and by the time you are rounding the corner, GCD should be done, and you should be able to flash the other two. They will come to you unless one is ranged. In the case of a ranged, use other skills that are not on GCD for whichever mobs comes into melee. Circle of Scorn, Spirits Within, or Brutal Swing to establish some kind of hit on the melee and free up your GCD for your ranged skill. In this scenario, your first shield lob or tomahawk should go off at max range, well before you should be reaching the corner to turn. Players only travel about 5 yalms per second unless they are sprinting, and in sprint, it doesn't get over 7.5. So your GCD should be up for either flash, overpower, or another shield lob before then. Make use of your off global skills when necessary in these situations.

WP after boss 1

------wall------------------------------------
|x2................x3
|
|....................._----------->
|................_--
|...............|..x1.___________________
|..............|........|
|.............|.........|
|............|..........|
|...........|...........|
|..........y............|

x2 is caster? Easy enough. x1 should be your first shield lob target. x2 your second shield lob target, and x3 and x1 hit with Circle of Scorn as you round the corner. Or, if on warrior, hit x3 with brutal swing. Sure, it stuns, but the mob will catch up, and your party will be continuing anyways to catch up to you. They should ignore it. If nothing else, a dps might jump on it, and I've already stated that if a dps take agro during your pull, then they are at fault. Further, direct damage on a mob is worth a lot more than healing, and this pull you mention is the first pull after the first boss in WP HM, meaning you still have the second pull up the stairs to grab too. The stunned mob will be out of stun by the time you reach the top of the stairs, and waiting for you when you get back to the corner half way up the stairs. x3, who we stunned in this scenario is also a melee mob, meaning he had to come into range of your AOE enmity skills to reach you. Further, all range mobs in this game do not sit further away than 15 yalms when they attack. This is seen in ever ranged attacker in the game. It's a little built in catch that the devs designed for situations with more than one ranged attacker, so you can shield lob or tomahawk them if they are attacking you. I specifically say if they are attacking you because if they are attacking someone else, their range minimum is based on how far they are from that person, not you, so can be outside of your range. But EVERY mob in the game that is range, has a maximum distance of 15 yalms on their range attacks for this specific reason. So if you range the melee closest, that ranged caster is going to come to you close enough for your tomahawk or shield lob, guaranteed. In fact, if you pull x1 from the max distance on shield lob, the caster should come close enough that all you have to do is catch him with the very edge of a flash along with x3