I think
@glass touched on this a bit, but it is an idea I am working with.
First, let's rename it
Heroic Surges (or
Surges, for short). We're doing more than healing now, and "
healing surges" is implying that it only does one specific thing. Its a wonder no one ever thought to do anything more with them.
I wouldn't charge for Encounter powers for a couple reasons:
- Characters typically have up to 2-4+ encounter powers per encounter. If you have a typical 8-10 encounters per adventuring day, you're gonna need to let the characters have a lot more surges, or allow them to replenish them quickly.
- Encounter powers don't really need to be managed. They're already limited to once each encounter, which also makes it easy for everyone to keep track.
Daily powers, on the other hand, have much less frequency. And many have complained that it is too limited and too sacred to use. They're also tedious to keep track of, especially when it takes several sessions to complete a day's worth of encounters. (
DM: Didn't you use that daily two weeks ago against the dragon? Player: We're still in the same day?! I thought we long rested last week...)
I'd probably keep it reasonable, like 1 surge per tier (i.e. a daily power of level 1-10 cost 1 surge, etc.). But I would also allow for more daily uses if the player was willing to spend his surges. That gives the player more option (fun!) without forcing a life-death decision (not fun). The trick is to make sure all classes have enough surges (or has the ability to replenish them) so they have enough for the
expected number of uses for daily powers and healing. That way, if the player chooses more power at the risk of not being able to heal before a long rest, its a strategic choice. (Or a gamble, which some players also enjoy.)
Since I'm looking at possibly replenishing surges during the adventure day, I could use milestones the same way that Action Points are earned. (And I'd really like to incorporate Action Points into that as well, but that would require some more thinking and finesse...

)