This grouping at Orikhiv...
7 mechanized brigades
4 brigades of the national guard (3 mechanized)
1 air assault brigade
1 air mobile brigade
1 Jäger brigade
and some assorted units together about another brigade perhaps
That's like 15 brigades. How ground down they have to be!
I bet at the very tip the 47th Mechanized brigade was ground through several times. They were at that position (the tip of the attacking spearhead) throughout the whole operation. Ukrainians use their units along US doctrine and when they put one unit to the front, it'll stay there the whole time, it isn't rotated out to rest and refill the ranks, but reinforcement is sent to them. I bet all the outer brigades donated soldiers to it, this is how those participated in the fight.
So the whole grouping was liek 45-50K soldiers I think. Now how many they can be?

Compare to this: >>50475 in late June.
At Orikhiv they started out with 2-3 brigades on the front (and some more at the back). Should have kept tabs on this to see how they directed more units there.