+1 per stand seems too much for only 35 points! (15 dice attacking in the open in the first round of every combat in the game. Defending 12 dice. No limit of units.). They are much more terryfing indeed than Chaos or Undead!!

- halbardiers 3/3/6+ 45 points
- Undead 2/3/6+ 30 points
- orcs 4/3/6+ 60 points
- Zealots 4/3/0 35 points
If you see the comparison, they are nearer to Orcs stats than to skeletons, but orcs fight with 4 dice all rounds against all enemies.
I would do:
1- Leave 35 points with +1 per unit (not per stand)
or
2- Increase cost to 45 points with +1 per stand.
But these options should be playtested a little bit, anyway, IMO.