Dirge, The Undying Gank Build

-1

Skipping two ranks of Soul Rip early on is just bad. It's an extremely efficient heal/nuke in lane. A better (if inevitably cluttered) skill build is:

Levels 1, 10, 12 and 13:
Decay
Levels 2, 3, 9 and 14:
Soul Rip
Levels 4, 5, 7 and 8:
Tombstone
Levels 6, 11, and 16:
Flesh Golem

Item choices are meh as well, Sange and Yasha is a merely average choice. Ring of Basilus and Urn of Shadows fail to mend your massive Mana problems as well. Bloodstone -> Sange and Yasha (if you must have it) is my recommended solution.