So here's the full scaling and my explanations.
Ahsoka scales to
this feat. However, it's doubtful that even all of these Padawans would equal one Ahsoka, whose Force potential was so massive that she was assigned to Anakin (he even describes her potential as enormous) and became a Padawan at a much younger age than normal. They have trouble lifting lightsabers and breaking human-sized ice walls. So she's
City Block level, with a close plus rating rather than just 27 tons. This makes sense, as she's inferior to the likes of Anakin, Ventress and Grievous, but can still put up a good fight.
Kanan lightly damaged a Kom'rk-class fighter, and later progressively grew in power. The far smaller and less armoured Maxillipede withstood a
102.4 ton crash with severe damage to the outer armour, but none to the interior. It's worth noting that a moderately
upscaled version of a
shuttle that's virtually the same as a Maxillipede survived a glancing crash from a Droid Fighter, which is known to obliterate shielded Clone Wars-era, and was not destroyed.
Ventress, Obi-Wan and Anakin are somewhat difficult to scale because they grow much more powerful throughout the series and display different degrees of superiority. Similarly, Darth Maul was
more powerful after Obi-Wan defeated him on Naboo, and only continued to grow stronger alongside Savage (it's even commented that his strength grows day-by-day). It was stated that Anakin grew
far more powerful between the end of the Clone Wars and Ahsoka's departure, which occurred one episode before Season 6. After turning to the Dark Side (not to mention training with Sidious),
Anakin grows stronger, and Obi-Wan eventually
matches him. Keep in mind that there's a roughly 9 month gap for Obi-Wan to have grown stronger since the Dooku and Anakin fights.
By 14 BBY, Vader far surpassed Anakin. In Rebels (
3 BBY), he also withstood a
491-ton temple explosion.
Ahsoka (50~ tons) < Season 1 Kanan (100~ tons) < Grand Inquisitor < Ventress (pre and post-Dark Disciple) ~ Obi-Wan ~ Anakin ~ Maul ("Resurrection") ~ Ahsoka (Season 7) ~ Savage ~ Grievous < Dooku ~ Anakin (Season 6) < Anakin (ROTS) < Pre-Mustafar Vader = Obi-Wan < Darth Vader (14 BBY) < Sidious.
I'm not sure where early Maul goes, but I doubt a Sith Lord that defeated fought a celebrated Jedi Master and very powerful Padawan is inferior to the Grand Inquisitor or early Ventress, let alone Season 1 Kanan.