What about casting a spell that would give the Tireless March bonus to a Sov/Champion, but that would also be limited in duration ?
It would allow you to recover some real strategic opportunities (blitzkrieg, long range scouting, recruiting raids) with a higher cost than before, when Tireless March was too much powerful. Spell duration being very limited, you would have to manage your buffs carefully.
That's the "spirit" of my recent attempt : Army Orders, at the Nexus. Details :
Motivation : Cast for 30 mana and 5 Influence - Unlocked with Ereog + Life II - Maintenance Cost = 1
Stimulation : Cast for 30 mana and 15 Gold - Unlocked with Ereog + Death II - Maintenance Cost = 1
Both of them have the following effect :
- Army gets +1 to movement (+1 for 5 life/death shards) during 15 turns
The spell can be stacked on the same army, if you can pay the cost (recast : 1 turn)
I've just started a big game with it (huge map, epic techs) but I'm not sure of the balance, any advice is welcome.
Btw, the Tireless March "new system" has been extended (by SD in FE v1.3x) to the spells giving the target the ability to cast Fireball and Heal (for what I've seen in the code).