Allocate and make save for regular hits. Then allocate and make saves for lance/macros, starting with the closest surviving enemy unit. Finally, allocate and make saves for TKs, again starting at the closest surviving unit.

You counter-charge the closest enemy unit, regardless of what formation it belongs to. This is evaluated on a unit-by-unit basis.

Q: If one of my formations is charged in an Assault do I counter charge only units from the assaulting formation or do I counter charge the nearest enemy unit even if it is in a supporting formation that is not part of the Assault?
A: A counter charging unit may engage enemy units from supporting formations, as long as they were the closest enemy units.

Third paragraph of 1.12.4 Counter Charges



That rule does not specify which formation the closest unit belongs to.

1.12.4 Counter Charges
An assault represents a brutal short-range battle involving
movement, shooting and close combat. Although the assaulting
formation will have initiated the combat, the defending
formation will have time to react to the enemy assault and
make limited moves of their own. To represent this, units from
the defending formation involved in the assault are allowed to
make a special move called a counter charge.
Defending units that are not already in base contact with an
enemy unit are allowed to counter charge. Units with a speed
of 30cm or more may make a counter charge move of 10cm.
Units with a speed of 25cm or less may make a counter charge
move of 5cm. Counter charges happen after the engaging
formation has finished moving and any overwatch shots have
been taken, but before the combat is resolved. All the normal
charge move rules apply, and defending formations must still
be in a legal formation after the counter charge moves have
been made (ie, all units must be within 5cm of another unit
from their formation). Embarked units may dismount.
A unit must use their counter charge move to move directly
towards the closest enemy unit. It may move into base contact
if close enough, and as long as the enemy is not already in
contact with two defending units. Units can choose not to
counter charge if they wish, but if they do counter charge they
must head towards the nearest enemy.

Counter charging units are allowed to counter charge enemy
units from any enemy formation, not just the one they were
assaulted by. Any enemy formations that are contacted by
counter charging units are drawn into the assault, and will fight
just as if they had made the assault themselves. Treat them and
the original attacking formation as a single formation for all
rules purposes for the duration of the assault.
A 2D6 roll is used to resolve a combined assault. If the attacker
loses then each formation is broken. If the attacker wins then
each formation receives a number of Blast markers equal to the
number of units the formation lost in the assault.

Rule clarifications:
Also if that's true which kinda makes sence are my two independant units that were more than 10cm apart counted as intermingled for the combat? Would I count the blast markers for.combat resolution from both units or just the assaulting one?

Any enemy formations that are contacted by
counter charging units are drawn into the assault, and will fight
just as if they had made the assault themselves. Treat them and
the original attacking formation as a single formation for all
rules purposes for the duration of the assault.
A 2D6 roll is used to resolve a combined assault. If the attacker
loses then each formation is broken. If the attacker wins then
each formation receives a number of Blast markers equal to the
number of units the formation lost in the assault.