Any high ranged heroes combining with take aim, psi blades or impetus with aghanims will result in a very high range, around 800-900, which even exceeds most heroes' sight range in night. This will allow you to participate in teamfights while being a screen away from them, or even being visible. This combo works very good with steroid spells, or high damage orbs, like overpower, bashes, arcane orb, glaives of wisdom, impetus, etc. But remember, that if you dont have some kind of escape mechanism in LoD, you will live a short life, since people usually stack stuns, so you need to pick an invisibility spell, or a blink, or even a long ranged stun or heavy slow will do it.
Of course there are a lot of possiblities, i will list 2 which i used, and worked.
1.
Essence aura (so i dont run out of mana)
Arcane orb (steroid spell, note that you need to autocast the orb to actually match your range, else it will attack with OD's defualt attack range, 470)
Take aim (obviously)
False promise (excellent spell for surviving)
on Oracle. I rushed orchid here, because the only thing that kept me not instakilling everyone was attack speed.
2.
Wind Walk of Clinkz (excellent spell for surviving, or searching for ganks)
Stifling Dagger (it was a poor choice, the idea behind it was to slow down enemies, so they cant run away from me while i am attacking them, but my team had multiple stuns, and the damage of the dagger is negligible, so it was useless in the game eventually)
Overpower (steroid spell)
Impetus (another steroid spell)
on Skywrath. I rushed straight to aghanims, to increase my range obviously.
In s6, you can make insane combos, like Psi blades AND Take aim, AND impetus, and still be able to pick other steroid spells and escape mechanisms.