Warning: Alm/Scendscale math below
On the channel, Alm had 62 atk, so I assumed he had a +6 buff, but that is likely wrong, because he had a 42/62/40/37/20 spread, subtracting 6 from atk/spd and 19 from atk, he ends at 42/37/34/37/20 - 170 BST. That it unlikely imo, he should have either 168 like other melee infantry (and the buff is a +7), or it is 172 like a trainee (with a +5 buff).
I'm leaning towards the 172 BST, because Eliwood/Micaiah/Camilla have higher BST than it should be for their classes. Micaiah and Camilla have 155 - while a recent flier mage like Summer Laevatein has 149. And Eliwood has 162, while Legendary Eliwood has 156. That means the buff is a +5, and Alm's attack without the buff and weapon is 38.
What this means is, with just a brave sword, his attack becomes 46 without buffs, not really impressive since he can't use DB3 because of Scendscale. Then lets give him the usual +6 atk visible buff - that is 52, which is already looking ok for a brave build.
Now, if he initiates against a 50 def unit with no triangle advantage/disadvantage, he usually would deal just 2x2 damage - basically nothing. But thanks to Scendscale, he also gets 13 true damage, so his final damage is 15x2 against a 50 def unit. If he had color advantage, his attack would be 62, causing 12x2 damage from the regular calculations, and 2x15 true damage, for a total of 27x2 damage - 54 damage total. And all that is against a 50 def unit - a number that usually only supertanks can reach - and no special taken into consideration.
If it was 40 def, which is more beliveable for non-supertanks tough units, with neutral matchup and the same 52 atk, it is 25x2 damage, 37x2 against green (and 11x2 against blue).
That was all considering a brave sword, as true damage pairs up very well it attacking twice. Using his prf or a slaying sword can also be very powerful.
tldr: I believe Scendscale can be really powerful if used correctly, and BST powercreep I guess
