I agree that the XP split should be done away with in general and remove the xp nerf from fighting AI armies.  The problem comes from the fact that once the easy xp is gone from your area, assuming the AI is also clearing their areas, there is nowhere to get xp from.  I know that the wildlands are left to clear, but once again if the AI is clearing like it should be those will be gone too leaving just the AI armies.  This is the problem from the Human to AI army battles that got a nerf a long time ago.  By removing the nerf it would eliminate the xp hole that occurs once you have cleared the areas you can initially.  From here you could then tone down the xp increase overall, my guess would be from .45 multiplier to about .2.

Currently heroes become too weak by endgame, especially if not a commander or mage.  The way things are done encourages folks to not use multiple heroes period, which I feel is even worse than the hero stack of doom. 

One idea: heroes get XP for leading units (commanders would get XP for being in towns).  Lvl 1 heroes get 1 xp per turn until lvl 2.

This might encourage the use of multiple hero-led armies.

I have no problem with low-level hero stacks of doom, high level stacks of mages is where the problem is.

I don't get it.

Ericridge the Magnificent is lvl 23. Commander

Gaylen the Grey is lvl 14. Commander

Recently recruited Joffery is lvl 3 He joined me like 20 turns ago and is a warrior.

Flurin recently joined as well and so she is lvl 9. Assassin.

Bacco the Beggar is lvl 11. Warrior.

Arcturus is lvl 17. A mage.

Adant Cerris is lvl 16. A defender.

Inslow is lvl 13. A commander.

Araine is lvl 7. A Mage. She just recently joined as well.

Its now season 428.

In general from what I has seen its all dependant on what you get in drops.

Heroes in classes that is dependent on drops to do their jobs of murdering stuff tend to fall behind the classes that don't.

Commanders and Mages don't care what drops and becomes a melee monster if they get a pyrebrand.

Assassins, Warriors, and Defenders need epic drops to become real epic.

One combo I had tried out with bacco once.. I was lucky enough to get a Doom Hammer and accessory drop that confers Maul ability on hero.

Doom hammer's +10% boost in damage for each successful attack combined with maul meant anything he hits is dead meat IT was so freakin awesome but I only got that combo once lol.

And then the experience heroes gain is very dependent on the size of maps.

To see how hard a latecomer can bloom despite having several other high lvl heroes.

https://forums.elementalgame.com/451257/page/1/

Personally I think the current maps in FE:LH isn't big enough but is just good enough to give you a taste.

But honestly most of the times I treat all my heroes like a mage/commander and never put them right there into the frontlines unless they don't have spells like Bacco. Then I start to push them to the frontlines otherwise they will be busy casting spells and plugging the gaps to ensure battle moves smoothly. Because in general, heroes is just one person while a troop can be up to six person and is safer from sudden death attacks unless you get careless/unlucky. And plus, most of the times heroes is busy spamming first aid everytime it comes off cd

I do tend not to play giant maps, as the point of steamrolling occurs too early, leading to a long grind of KOing dead empires, which isn't fun.

That might explain why I see things the way I do.

True, but groups of units weren't as strong as they are in LH.  The champ rush loses its effectiveness now after the early game. 

Also the solution to me was something that made the game less fun, and brought its own set of problems.

Yup I notice the same thing too.

Its just insane. I could send in stuff and they ignore me or attempt to make me their dinner.

But an outpost or anything with monster den will inevitably have monsters attempting to raze it. But I watch outposts get razed by monsters very rarely now at least. If I notice a outpost that somehow stay unpillaged despite being surrounded by three monsters and four patrolling monsters. I send a random unit of mine over to them then the outpost will get razed by accident while they're attempting to kill my unit. I have done this to get damn outposts which stayed unrazed for 100+ turns while mine gets razed every 10 turns.

Which makes me suspect that AI's outposts is somehow invisble barriers to the monsters unless they're chasing a unit of mine. >.>

Or more worse, an empire city with ogre nest in it's walls with an ogre army still live

And what's more, that nest is now worked by the city and that city is producing ogres despite the bone ogre army still alive and sitting on the nest.

It was so.. lame that I just restarted right there on the spot.

And Frogboy wonders why monster/AI alliance rumors still persist lol.

Oh yeah when I was trying to capture that empire city.. the bone ogre army moved out of the city and attempted to murder me despite the fact that the city is only defended by militia.

Glad to hear it's not just me then. I was starting to wonder if I were cursed or the AI just doesn't like the way I look! 

The problem I have is that because there is limited (easy) XP for heroes, without sharing, there is rarely enough XP available for more than 2 heroes. I have tried not clearing lairs so they keep spawning, and this works to an extent, but eventually other factions come through and clear them. To me, the problem is not the champion XP split, but the lack of xp available later in the game.

The simple fix would be to reduce the penalty to trained armies and champions give to fighting one another.  Right now if I remember correctly when two armies fight they only give 1/10 th the xp they normally should.  My suggestion is reduce the penalty to maybe 1/2 thereby increasing the total xp available at the mid to later stages of the game.