Soul of the Aspects
This is one great looking pet, if you are having troubles with the Pandaren Water Spirit, try this out!
Your team will comprise of your carry (preferably lvl 15 or so) and Soul of Aspects together with Flayer Youngling.
Turn 1 - Start off with Flayer Youngling
~ If you face Marley, use reflect to reflect the whirlpool back at him
~ If you face Tiptoe 1st, use Rampage(3rd button) to get him down, use Triple Snap(1st button) to finish him off if he isnt dead, then follow the above step to reflect whirlpool back at Marley after killing Tiptoe.
After u reflect the whirlpool, switch to Aspects, Marley will do a dive, on the turn you can react, reflect the dive back at Marley. (Marley will then turn damage from Dive and then Whirlpool on the following turn)
Use Surge of Light(3rd button) for a chance to stun Marley. Marley should be near dead at this point. (Use Claw for 1st button for Aspects should u need to face off against Tiptoe)
After Marley is dead, swop in your Carry for one turn(Must watch out for any residual whirlpools from Marley). At this point u can either choose to use either Flayer or Aspects(whichever has more HP left ) .
On his 1st turn the Flowing Pandaren Spirit would usually cast Geyser, and on 2nd turn he would cast Whirlpool. Do not reflect his abilities during these 2 turns BUT continue to beat upon him. On the turn where u notice there is one turn left on the Whirlpool and Geyser debuff, use reflection. His Tidal Wave, Whirlpool and Geyser will all miss your pet. Either the Geyser or Whirlpool would be reflected upon him. Continue beating on him for 1-2 turns and your carry can reap all the experience for himself.
This method works better for Magical pets since they take less damage from Tidal Wave. But you can carry lower level pets as long as you kill the enemies as fast as you can.