I was recently doing this quest in Grizzly Hills.
This will not work if your quest is complete. As in you have 4/4 giants free.
Free At Last And I noticed you have to use the Quest item several times on the giants before they become "Free" but the annouying 10 second cooldown made things slower. I eventually tried spamming the button i keyed it to and i shot 2 beams at once. I then made a macro that looks like this.
And set that macro to a hot bar, i went to a giant to see if this would work, and the minute i pressed that button several beams came out and the giant immidiantly turned free. This may not work because some giants can not be free'd, and keep in mind you must auctually spam the macro when its up (Press it 4 times fast) for better results./use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
/use Gavrock's Runebreaker
The above image is a giant i hit when my quest was at 4/4. I just abandonded the quest and am about to re-do it and take a screenshot of it happening.
This image above shows me re-doing the quest and instantly turning a giant free.