TI3 has the Fleet Supply mechanism, which regulates the maximum amount of (capitol) ships you may have in any given hex.
I favour such a mechanism because it prevents the much dreaded "stack of doom" from taking control of every game and annihilating most other strategic approaches.
So far I haven't seen any indication yet that there will be such a mechanism in Runewars as well, though I really hope so.
It could be a very good and elegant system really.
How ?
The answer is in the Resource Dials ( right in front of you and clearly visible for everyone )
Suppose you're playing Elves and you have your arrows pointing at
4 food = 2 Warriors
5 Wood = 3 Archers
5 ore = 1 Sorceres and 1 Pegasus Rider
There you have it : each area you control may hold no more than 2 Warriors + 3 Archers + 1 Sorceress + 1 Pegasus Rider.
Get your Resource Dial Arrows up and you increase the number of specific units you can have in a stack, when your Arrows go down, you may have to slim down your armies ( yes, discarding units )
Thus, sizeable armies are possible ( with maxed out Resource Dials ) but you can't stack every unit you have in one area and move your Stack of Doom from one area to another.
Players having maxed out armies will have to watch out carefully for when the Harvest Order Card can be played and Dials are readjusted as I expect that armies will have to adjust to Supply changes immediately, thus there is a chance of losing units in some armies simply because your Resource Dials go " down".
Looking at it from this perspective, you'll never have more than 2 Sorceresses and 2 Pegasus Riders in any army, so drawing 1 Fate card per unit type during battle seems a more reasonable mechanism and isn't as "luck" based anymore as most people are currently assuming ( in case you can have any number of units in any given army. )
Drawing just 1 Fate Card for a stack of 10 Archers seems like a very poor and luck based mechanism, not even mentioning not being able to score more than 1 Hit.
However, since the Elves could only have 4 Archers max in a stack, I think I could live with the "draw 1 Fate Card Mechanism" in battle as the other Elves would be there to soak up enemy damage and to help you win the Strength count.
Another possibilty ( though unlikely ) would be to let you Draw 1 Fate Card per unit = 4 Fate cards in case you have 4 Archers
but ... choose one Fate Card to play as their battle result. This could make battles more tactical ...
As a conclusion : I would really like a hard limit to the number of units you can have in a certain area as it prevents endless " build-ups" and turtling and besides, there's only so much room in each area, you probaly can't have too great amounts of figures in them without cluttering up the board. If maxed out armies are not easy to get as well , due to the limitation of Resources, we could see alot of interesting battles between "smaller" armies.
Good, look forward to that.