Also be aware that Cyclonian is a Level 40 Elite Elemental. You'll need a friend to assist you in killing him in order to obtain the Whirlwind Heart.

Soloed it at level 40. Get some nature protection potion from the auction house. Since Cyclonian is an elemental, he deals nature damage. The potions will absorb the damage. You can defeat him easily after that.
Watch out for his knockback though. You get thrown back a great distance and if you do not land in the river, you will get a fair amount of damage. Even if you do land in the river and get no damage, you will be away a great distance and by the time you reach the Cyclonian, he will have healed - not fully, but enough to make you irritated.

Apparently, the guy should summon Cyclonian again when you speak to him. If this doesn't work, Try dropping the quest and re-taking it. Since you already handled the materials on the previous quest, you won't need to recollect 'em.

As already mentioned, Cyclonian is easily soloable by drinking a https://vanillawowdb.com/?item=6052 Nature Protection Potion.

There are a few other points that may facilitate the fight:

- Drink your first https://vanillawowdb.com/?item=6052 Nature Protection Potion right after speaking with https://vanillawowdb.com/?npc=6176 Bath'rah the Windwatcher. When Cyclonian is at about 50% health your potion-cooldown will be ready again. Use a second pot if necessary.

- Activate the cast bar in your interface-options. Now you can see when Cyclonian starts to cast https://vanillawowdb.com/?spell=6982 Gust of Wind as well as https://vanillawowdb.com/?spell=15576 Whirlwind and avoid the effect. You can avoid the effect of both, https://vanillawowdb.com/?spell=6982 Gust of Wind and https://vanillawowdb.com/?spell=15576 Whirlwind, by staying away from Cyclonian while he casts.

- Always fight Cyclonian with your back to the walls of the old ruins surrounding the spot https://vanillawowdb.com/?npc=6176 Bath'rah the Windwatcher summons Cyclonian. Cyclonian will use https://vanillawowdb.com/?spell=18670 Knock Away. By fighting with your back to the walls you will avoid the fall damage every time he uses it.

- Use your cooldowns. There's no reason to not use https://vanillawowdb.com/?spell=18499 Berserker Rage if you fight in Berserker stance, https://vanillawowdb.com/?spell=20230 Retaliation if you fight in Battle Stance or https://vanillawowdb.com/?spell=871 Shield Wall if you fight in Defensive Stance. As far as I tested, Cyclonian's normal attacks do nature damage but can be counterattacked.

- Cyclonian is immune to https://vanillawowdb.com/?spell=6178 Charge's https://vanillawowdb.com/?spell=7922 Charge Stun. I didn't test if he's also immune to https://vanillawowdb.com/?spell=1671 Shield Bash, https://vanillawowdb.com/?spell=6552 Pummel and https://vanillawowdb.com/?spell=12809 Concussion Blow.

I fought Cyclonian as a level 38 Protection Warrior with 2201 health points and no buffs by other classes. I wielded https://vanillawowdb.com/?item=6829 Sword of Serenity and https://vanillawowdb.com/?item=6694 Heart of Agamaggan.