Having played a couple of days under 3.0, I'm beginning to wonder why typhoon is there at all. It has fairly crap damage, and a crap effect. Sure it looks cool, but the only reason why I ever really use it is as a gimmick, and in the off-chance I can time it right to interrupt a cast (quite often seems to have no effect) which is difficult due to the delay, the time it takes for the spell to move, and latency.
So how could Typhoon actually be a worthwhile talent? I would assume the intention for the ability is to get melee classes off you for a short period, yet at the moment the small knock-back is a joke, as they're back within melee range within seconds.
How would I change it?
1) I would reduce the range of the spell quite substantially - if they're outside of 20yards say, we've got plenty of breathing space anyway.
2) I would change the way the "wave" mechanic works - i.e. instead of a wave eminating from the caster, I would have the spell instantly hit targets within the cone on cast - this would give it some utility as a spell interrupt, as it would actually react when you push the button.
3) I would increase the knockback effect - perhaps to 15yards.
4) I would introduce a daze effect after the knockback - i.e. dazes target for 2-3 seconds: this would assist in making the ability worthwhile as creating breathing room.
5) I would increase the cooldown on the spell to reflect its greater utility value and the power of some of its effects.
6) Possibly tweak the mana cost depending on how Blizzard values the relative spellpower/utility to mana ratio.
7) I would leave the damage as it is, or slightly reduce it: its reasonable damage, and should be used for utility rather than damage anyway - for the manacost we have far more efficient damage spells.
What do you think?