Don't extrapolate from videos that "everyone" is farming T10. Of course no one wants to show off their T7 speed farming spec, so you only see the TX builds ;-)
There are two mechanics that let you "shortcut" the way to TX:
1) In-Geom. Use powerful spells with relatively short cooldown (the 10-15s cooldown spells that most classes have) which you can almost spam for 15 seconds after killing an elite pack. This is the cornerstone of the Explosive Blast wizard build or the LoN Crusader on TX, and it was the item that single-handedly enabled the Dashing Strike monk in S3. Every class has a movement speed ability that greatly benefits from In-Geom.
2) Boon of the Hoarder+Goldwrap (+Avarice Band). You'll get tons of gold from every mob you kill, which translates into ridiculous amounts of armor, making you virtually immortal, such that you can quickly get to the next elite pack (the movement speed from the gem also helps).
Those two in combination increase killing speed, movement speed, and survivability. You're ready for TX simply when In-Geom is up close to 100% on open maps (on cave maps that's sometimes impossible).
Don't extrapolate from videos that "everyone" is farming T10. Of course no one wants to show off their T7 speed farming spec, so you only see the TX builds ;-)
There are two mechanics that let you "shortcut" the way to TX:
1) In-Geom. Use powerful spells with relatively short cooldown (the 10-15s cooldown spells that most classes have) which you can almost spam for 15 seconds after killing an elite pack. This is the cornerstone of the Explosive Blast wizard build or the LoN Crusader on TX, and it was the item that single-handedly enabled the Dashing Strike monk in S3. Every class has a movement speed ability that greatly benefits from In-Geom.
2) Boon of the Hoarder+Goldwrap (+Avarice Band). You'll get tons of gold from every mob you kill, which translates into ridiculous amounts of armor, making you virtually immortal, such that you can quickly get to the next elite pack (the movement speed from the gem also helps).
Those two in combination increase killing speed, movement speed, and survivability. You're ready for TX simply when In-Geom is up close to 100% on open maps (on cave maps that's sometimes impossible).