Well, as you all know by now, I've never been successful with hedgie's main build (Heal-Silence) in 3v3. Therefore, I've finally devised 2 non-half-assed builds that cover, more or less, all 3v3 scenarios. The second one is a nnnils' ri... Errr, my interpretation of several nnnils' ideas about how to play Sedna.
Scenario 1. Laning with Rook (well, that's ~75% of the matches); no Reg on the opposing team; reliable teammates:
Heal1>HW1>Pnc1>Heal2>HW2>Sil1>Heal3>CH/MP1>MP1/SAVE>Heal4+MP2>Sil2; Sil3+MP3 at 15.
No speed items (use CoN to escape ganks), standard kit: 2 helms, 3 armors, tps, locks, sigils.
The emphasis is put on supporting your Rook and never running out of mana, even early game. Quite a safe build, too. I love it.
Scenario 2. Laning with a squishy teammate (TB, DA, Reg); Reg on the opposing team; unreliable teammates:
Heal1>HW1>IG1>Heal2>HW2>Sil1>IG2>Heal3/CH>IG3>Sil2; yup, no Pounce.
Make BoS your first purchase; WoS is optional until locking phase.
The main idea is to get as much hps regen + as much speed as possible early/early-mid game (IG3+BoS=+25% speed; IG3+BoS+WoS=+50% speed). The build plays like this: you run up to the opponent, kill his monk, AA him insolently, retreat, back to full health in seconds, run up to the opponent, etc. Best served with strong towers. Ganks can be outrun. I thank God and nnnils for this wonderful, blatantly anti-hedgian (IG+HW? no Pounce? BLASPHEMY!) build idea. Ha-ha, take that!