Ok, So I found out a good place to grind motes of water.
There is a lake surrounding the Skettis (In Terokkar Forest )
When you see the lake drop into it and there are a bunch of lvl 71-71 mobs in there
They have a high chance to drop motes of water (Seems like a 50% drop rate, and You mostly get 2 Motes instead of one)
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Alright for the boe blues, There's a mob in the Blasted lands called Teremus the Devourer
He has a 100% chance to drop a Flawless Draenethyst Sphere used for this quest.
To Serve Kum'isha - Quest - World of Warcraft
He drops 1 - 3 and he is quite tough, If you're new to 70 bring a healer along he hits for quite a bit even to a lvl 70 mail wearer (My enhancement shaman) He is immune to ALMOST all spells. So watch out.