Skillbuild
Avalanche
Toss
Avalanche
Toss
Avalanche
Toss
Toss
Avalanche
Grow
Stats
Grow
Craggy / Stats
Craggy / Stats
Craggy / Stats
Craggy / Stats
Grow
Stats /Craggy
Stats /Craggy
Stats /Craggy
Stats /Craggy
– 25. Stats

Always get your disable first. Always. Actually Toss scales better than Avalanche, since the casting range improves a lot, but the double damage from Avalanche in a Ava/Toss combo is too good to pass up. But due to the weird scaling of Avalanche ( the last level only gives you +40 dmg), getting level 4 Toss over level 4 Avalanche is recommended.

I’ve seen people switching Avalanche and Grow at level 8 and 9. Grow gives additional 45 damage to the tossed unit and another 40 physical damage for your combo and 5 ms, Avalanche gives 40 AoE damage and 80 damage to a unit in Ava/Toss. Since you won’t be using Avalanche only for Ava/Toss, I find Avalanche to be more effective and the 5 ms not really important. It’s a small difference though and only matters for one level.

Whether you get Craggy or Stats after level 11 depends on your enemies. If physical damage starts to play an important role quite early in the game or the enemy team consists of many melee heroes, Craggy will be your choice. If that is not the case, feel free to fill in some Stats, they really help your low manapool and some HP never hurt. At least after lvl 16 you would want to skill Craggy anyway, you simply need the armor. Adjust to the situation.