(2.2) Demopolos' Windripper: 197k LA Chain/270k SA Chain/300k TS/821k Burning Arrow

And this can be used to smooth mana without changing tree (for more expensive skill like LA):

-Lightning Arrow/Chain with auras + golem + BR + 10 frenzy + 3 power (154k):
-Lightning Arrow/Chain with auras + golem + BR + 10 frenzy + 3 power + atziri flaks + vaal haste (197k):
-Split Arrow/chain with auras + golem + BR + 10 frenzy + 3 power (213k):
-Split arrow/chain with auras + golem + BR + 10 frenzy + 3 power + atziri flaks + vaal haste (270k):
-Tornado Shot with auras + golem + BR + 10 frenzy + 3 power (235k):
-Tornado Shot with auras + golem + BR + 10 frenzy + 3 power + atziri flask + vaal haste (297k):
-Burning arrow with auras + golem + BR + 10 frenzy + 3 power (647k):
-Burning arrow with auras + golem + BR + 10 frenzy + 3 power + atziri flask + vaal haste (821k):
-Blast Rain (lvl 19 gem) with auras + golem + BR + 10 frenzy + 3 power (212k):
-Blast Rain (lvl 19 gem) with auras + golem + BR + 10 frenzy + 3 power + atziri flask + vaal haste (269k):

-With Jade + granite + topaz flask (100% uptime with surgeon's):
-With Jade + granite + topaz flask + vaal grace:
-No flasks (not representative of gameplay, 100% uptime):

Level 40(ish)- poeurl.com/vBV
Level 70(ish)- poeurl.com/vBW

-TS scales way better until you have a really high dps setup. This will do a ton of work leveling, and should include as many of these links as you can fit, in this order of importance: TS > GMP > WED > Added light damage > Added cold damage > fast attacks.

-Flat elemental damage is incredibly important for this build, so the earlier you can work in your aura's, the better. I would probably rank them in this order of importance: wrath > herald of ice > herald of thunder. Elreon rings, enlighten gem, charisma (in tree), mana leech node (the hybrid 4% one), and mana on hit jewels can help to make this possible.

-As links are so important on bow builds, I highly recommend getting a tabula rasa to start. Having a 6L from the beginning is invaluable, and will help you in leveling any character in the future.

- Use whatever bow has the highest speed, crit, and flat elemental you can find at a given level. At level 1, you can use Storm Cloud, and at level 32 you can use Death's Harp. After this shoot for a rare that is an upgrade, or if you can afford it, a non-legacy windripper.... they are very solid, and in standard I see them for 3 ex without links (unneeded alongside tabula).

-If you can get your hands on 2 elreon rings with - 8 mana cost, they are incredibly OP for leveling, and can totally trivialize mana costs. They can be helpful later on if you want to have flexibility with mana (avoid mana nodes in tree, or use more expensive skills like LA). Any other and other helpful stats you get are just a bonus, but some combination of crit, WED, life, attack speed, resists, flat elemental damage) is really awesome. See crit ring I multimodded in my gear in OP for an endgame example (in acuity version of gear).

-Maligaro's are incredible for leveling if they are affordable for you... as this is a crit build, this really helps early on as you are haven't had a chance to grab all the gg bow crit nodes in tree yet. They are incredibly OP at lvl 21!

-Low level req necks with some combination of crit chance, crit multi, weapon elemental damage, flat elemental damage... are a big boost offensively too. You could get an elreon neck, but this would probably be very expensive with good stats.

-Although they lack movement speed, Wake of Destruction boots have a massive 1-120 lightning damage roll on them, and can be used at level 28 if you are hurting for damage. Sneaking some extra flat elemental damage or WED on your rares is a big help as well. Lioneye's boots are a good option too, and have move speed as well.

For your endgame rares, here's a reference for finding the right pieces. You'll find things broken down by implicit/prefix/suffix in the order I believe to be most efficient to prioritize for each slot:

Belt:
Implicit- life > strength
Prefixes- weapon elemental damage (vital) > life > armour > move speed
Suffixes- resists > strength

Amulet:
Implicit- strength/int > int > dex/int > item rarity
Prefixes- Weapon elemental damage > life > flat elemental damage (lightning best) > eva % > mana (if not BM version)
Suffixes- Crit multi (vital) > crit chance > accuracy > lightning damage % > int > resist all > single resists

Rings:
Implicit- crit > all res > dual res > single res > life > chaos res
Prefix- weapon elemental damage (vital) > life > flat elemental damage (lightning best) > eva % > mana (if not BM version)
Suffixes- accuracy (very efficient here) > int > attack speed > all res > single res