Skill build:
If you want to go for firstblood Battery is the first skill choice.
1: Battery/Rocket Flare
2: Rocket Flare/ Battery
3: Rocket Flare
4: Battery/Power Cog
5: Rocket Flare
6: Hookshot
7: Rocket Flare
8: Battery
9: Battery
10: Battery/Power Cog
11: Hookshot
12: Power Cog/Stats
13: Power Cog/Stats
14: Power Cog/Stats
15: Stats
16: Hookshot
17: Stats/Power Cog
18: Stats/Power Cog
19: Stats/Power Cog
20-25: Stats

Itembuild:

Lane: Stout shield, 3x Ironwood Branches, Tangos, Salve/2x Clarities.

Another build for laning: Quelling blade, 3x Ironwoods Branches,Tangos.

Mid: 2x Gauntlets Of Strength, Courier, Tangos/Salve.

Another mid build if courier is bought and shared: Sobi Mask, 3x Ironwood Branches, Tangos/Salve.

Mid laning equals fast Aghanim's rush, and ganking like hell.
Get vanguard first if you're getting beaten by melee carries.