I've come across some ideas while testing the game and this thread inspired me to come up with some suggestions: I believe the Seleucids should get another spearcavalry (could be Thessalian/Macedonian Settlers/Xystophoroi, Galatians or Median/Persian Lancers) with the Companions being made into a champion like the Macedonian one. Antiochus III's Companions (and I guess Seleucid ones in general) where quite devastating. Even in defeats like Raphia and Magnesia they routed their opposing enemy flank (at Magnesia actually being a Roman legion, not cavalry or light troops). If there's an issue with Cataphracts being a Champion spearcavalry as well, the Cataphracts could be made into a tech upgrade of the Companions with increased armor and reduced speed (Though both units coexisted even after the introduction of Cataphracts).If the above brings an issue of too many champions for them (see bellow as well) the Scythed Chariots can become normal units, they were quite outdated and ineffective anyway. Models could be the persian ones with armored riders or just one of them working as skirites and other one-rank citizen soldiers. A simular downgrading could work for the Maurayan Chariots as well. Edit: How about all chariots as one rank non champion units that can't gather? Makes the most sense to me.The Seleucids could get the Maurayan bonus of many champion units, since it fits them well with so many different units and subjects and the Maurayans could get something else. Or both could share it (or see bellow).I'm not too fond of Ptolemaics having only native phalanx, since its use was limited compared to Greek/Macedonian one. Seleucids as well could have the Silver Shield Pikemen as a champion and a regular phalanx as spear infantry. Same with Macedonians and a pezaitaros/bronze shield phalanx and an Agema one. Having 2 x pike units for those factions could be an overkill from a gameplay perspective though.Now to the major idea: Champion units in general could be somewhat redesigned. Like some of them requiring reform techs (that would replace another champion when applicable): Spartan Pikemen (Cleomenian Reforms) - Add them or replace Spartan Hoplites with themSeleucid Cataphract Reforms - Add them or replace Companion Cavalry with themSeleucid/Ptolemaic Thorakites/Infantry Romanisation ReformsMacedonian Late Pikemen (Perseus Reforms) with heavier armor. This could also be a paired tech with a cavalry tech or contain a cavalry debuff to reflect the increasing focus on phalanx and the decline of cavalry in late Antigonid Macedonia.Macedonian Royal PeltastsPersian War Elephants, Horse Archers and Kardakes/Mercenery Hoplites (as core game units)Carthaginian Sacred Band Cavalry (as core game unit)Athenian Iphicratian Hoplites/PeltastsMauryan Elephant Archer turned into champion (as any elephant unit should imo)Cretan Archers/Rhodian Slingers could also be champion mercenaries replaced by some generic levy versions as citizens.There's more I can't think of now I guess. Even Marian Reforms could work this way if you deside to implement them. It would work sweetly with having more famous/fancy champion units without breaking the game balance since the reform/research techs could be priced accordingly. Edit: It could work like, each civ has 2 champion units by default (or more for factions having some civ bonus on this). Those would be the most commonly used or better gameplay serving ones, mixing best with the rest of each civs unit line up. Then with reform techs new ones would replace some of the default champion units (or even some citizen-soldiers in some cases for a bigger cost). Other techs would unlock extra champion units for some civs instead of replacing old ones, when it fits historical accuracy or gameplay. This should generally cost more than reform techs as it would broaden the available unit rooster. The number of extra units granted this way and the cost of the reform/unlock techs could besides following historical accuracy depend on late game faction strength. So say the Gauls prove weaker in late game, they could have cheaper reform/unlock techs or more extra champions than other factions.