Kael'Thas by Lafiel

Level 1:
-Mana addict: Unchanged

-Convection: ? Quest: Damaging an enemy Hero with Flamestrike increases its damage by 5, up to 100. This bonus is lost on death.

? Reward: After hitting 20 enemy Heroes, increase Flamestrike damage by an additional 100 and no longer lose any bonuses on death.
? Gambit: Reduces Flamestrike mana cost by 25 mana, each death increases it's cost by 5 mana up to 5 times.

-Sunfire Enchantment: Activating Verdant Spheres causes Kael'thas's next 2 Basic Attacks to instead deal 115 Spell Damage and bring him back 1,5% of it's maximum health and mana, tripled against heroes.
If both of them hit enemy Heroes, gain 15% Spell Power for 10 seconds.

Level 4
-Nether Wind : Unchanged

-Energy Roil: Unchanged

-Tri-O : Reduces Verdant Sphere cooldown by 2 seconds for each enemy hero hit by Gravity Lapse

Level 7
-Burned Flesh: Unchanged

-Sun King's Fury: Gain 1 meter attack range. Hitting an enemy hero with any abilitie cause Kael'Thas's next Basic Attack within 6 seconds to deal an additional 75 Spell Damage. Stores up to 2 charges.

-Arcane Dynamic: Cast a basic ability and hit at least one enemy hero with it increases spell power by 3% for 5 seconds, up to 15%.

Level 13

-Pyromaniac: Unchanged

-Backdraft : Living Bomb's explosion Slows enemy Movement Speed by 40% for 1,5 second.

-Fission Bomb: Basic attacking an enemy hero carrying a Living Bomb makes it explode 0,75 second earlier and deal the corresponding periodic damage as bonus magic damage.

Level 16

-Fury of the Sunwell : Unchanged

-Ignite : Unchanged

-Twin Spheres : Unchanged

Level 20

-Rebirth : Increases Phoenix duration to 12 second and attack range by 25%. Kael'Thas and Phoenix's basic attacks on heroes reduces Phoenix cooldown by 3 seconds.

-Presence Of Mind: Unchanged

-Flamethrower : Unchanged

-Gravitic Pulses : Gravity Lapse reduces enemy heroes' armor by 25 for 3 seconds

Making tweaks on Kael'Thas talents and abitilies to fix two main issues:

-Pyroblast and Living Bomb are two spells that offers too little skill expression which makes them create comical yet frustrating situations at lower ranks while being of little use outside PvE at higher ranks.
-Many talent in Kael'Thas tree can be weak, not stimulating to play or empowering the worst aspects of the hero at lesser ranks.

Thus my guiding ideas here where:
-Removing any Living Bomb talents outside of the dedicated level 13. And make sure they add skill expression without potential noob-banes
-Adding a spread limit: only 2 heroes can now receive a spread bomb. This is unnoticeable at higher ranks while limiting the havoc potential of the spell at lesser ranks.

-Add (a little) skill and counterplay to pyroblast as it's damages now depends on your recent ability damages output: you now need to time it well and your enemies can avoid your other damages sources while it is still a decent cherry on the top of a poke build and playstyle.
-Tweaked the Phoenix to feel a bit more active and synergizing with my next point.

-Creating a cheesy autoattack build.
-Reviving some old talent and paying attention on the possibility to create many hybrid builds.
-Changing level 1 talents, Convection is still a gamble but it doesn't ruin your mana earlygame anymore while 1/4/7 D talents where fused into something more active and original.

I'm open on any remarks, suggestions and review.