Classical Era UUs:
Congo Swordsman
Replaces Swordsman
Prod 90->110
Strength 35->38
Iron Cost 20->10
+10 defense against ranged attacks
No movement penalty and sight penalty on trees/jungles
Analysis: Used to be a negative UU, but it is enhanced by quite a lot in the April patch. Now it is a not-so-bad unit.
Macedon Swordsman
Replaces Swordsman
Prod 90->100
Strength 35->38
Iron Cost 20->5
+5 attack against districts
+50% support
Analysis: This ability is much more useful than the Congo one. Combined with GG and Twilight Valor and Oligarchy the Strength on siege can be 57. Enhanced quite a lot on the Apr patch.
Legion
Replaces Swordsman
Prod 90->110
Strength 35->40
Iron Cost 20->10
Have 1 builder charge
Analysis: The 1 builder charge is a great deal for Legions. A charge worth some productions, so Legion is actually cheaper than a normal swordsman, this ability also enables Legion to fix pillaged tiles, very useful, especially under the pillage-conquer-fix-rebel-pillage cycle.
Toa
Replaces Swordsman
Prod 90->120
Strength 35->38
Iron Cost 20->0
Unlock at Construction
Have 1 builder charge
-5 for nearby enemies
Analysis: Construction requires much more science than iron working, however Toa is the strongest swordsman. It also has a builder charge. The pillage-conquer-fix-rebel-pillage cycle is extremely powerful for Maori, as it can easily get some cities with low loyalty.
Immortal
Replaces Swordsman
Prod 90->100
Iron Cost 20->10
Can perform ranged attack(range 2 strength 25)
Analysis: The ability to perform ranged attack is good. Though it does not produce much damage, it offers a way for front-line soldier to do sth. other than simply staying there. This unit is also enhanced by a lot in Apr patch.
Varu
Uses heavy-cav promotion tree, however we compare it with swordsman
Prod 90->120
Strength 35->40
Iron Cost 20->0
Unlock at Horseback riding
-5 for nearby enemies
Against anti-cav +5->-10
Analysis: Compared with the Apr-updated Toa, a Varu seems weaker, +2 strength but 1 less builder charge. However it unlocks much earlier. An early powerful unit without resource cost, so you don't need that black market and can therefore spend your governor title on Pingala and accelerates early game more.
Hetaroi
Replaces Horseman
Prod 90->100
Horse Cost 20->10
1 free promotion
Uses heavy cav promotion tree
+5 when the battlefield is adj to a GG
+5 GG point when defeating enemy
Analysis: A very useful early-game UU. 1 free-pomotion half-resource horseman is good enough especially after the Apr nerf of Swordsman, the heavy-cav promotion tree is also better as it contains the siege +7,
and we also have +5 when the battlefield is adj to a GG and +5 GG point when defeating enemy, both very useful skills.