I haven't found that to be a big problem.
My last campaign went up to 13th-level, and we had a healer who was as optimized as a non-pacifist cleric can get. The player built a balanced between devoted and tactical warpriest who had a large number of Healing Strike-like powers. The battles got really hard when the player considered dipping into his one or two
daily healing utilities after using up all the encounter ones.
In the second last battle, I put five PCs up against 5 elite NPCs... who had their own (limited) healing. In the last round, three PCs were down, one bad guy was out (ran out of healing surges and bloodied, so decided not to stick around) and the NPC healer recharged their healing strike power again. They were taking a -2 penalty to hit (due to being hit by a paladin at-will whose name I can't recall at the moment) and marked by said PC paladin, who of course had high AC. The healer and his leader (a warlord/paladin-type) were both at less than 10 hit points, but the conscious PCs were so drained of healing abilities they were a hit from death too. The healer shifted into an attack position... and missed by one point. One. It was probably the closest to a TPK I had without actually wiping out the group.
The last battle (same in-universe day) had a solo boss, four artillery pieces that could regenerate her, and a soldier to guard her, all at PC level (this time there were six players, so six PCs). The PCs quickly learned to kill the artillery pieces because she was regenerating the damage they dealt to her. During the battle one PC's head blew up (the artillery pieces did psychic damage), so ... dead. When the solo was left by herself, the PCs were hitting her with 200 damage a round, and she couldn't keep up (she was a controller). It went very much like the first solo fight I had ever done (each dealt 200 damage to each other in the first round, and these were 3rd-level PCs vs a 4th-level solo brute), only this time the PCs were drained before they could fight her. Her aura very nearly TPK'd the party, but other than the one dead PC they desperately expended every healing resource they could, and convinced her to surrender. (Then they started working for her!)
And yes, those battles took a
long time. So I guess I'm not a master.
Many of these techniques I learned from going to help sites. After going through Kingmaker (I was a player in that one) I noticed that many other players in my group only understood the numbers on their sheet, and hardly that (I had to explain the Big Six items, the requirement to do so stunned me). A lot of things a player or DM needs to know are unwritten, at least in the rulebooks.
NewJeffCT said:
The players liked it, but when the BBEG is "down" to 500 hit points (bloodied) and all out of encounter/daily powers and is stuck with at-wills and a potential recharge only, and the players are all at full, it got pretty boring for me as DM.
Especially if the boss is a solo, the battle will take a long time. The DM should never give a solo an encounter ability (always recharge in some way), and the only encounter powers a boss should have is something like a dragon's Bloodied Breath (which does not count as an "additional" power). I learned this lesson after running Keep on the Shadowfell. Kalarel was "only" an elite, but he had so many levels he could have been an at-level solo instead (indeed, he should have been). He used up an encounter power and was reduced to using at-wills for the rest of the night. (I flatly lied to my players and told them he died when he had just hit his bloodied value, it was so boring. They were basically losing because they couldn't hit him.)
I don't see a need to change the number of surges regained per day. Instead, I have found ways to put PCs three as many as six encounters in a game day. I've had several encounters where some PCs
started the battle with
zero surges.
Maybe the PCs are doing boss battles as the first battle of the day, but a defense in depth should prevent that, and options that enable PCs to bypass encounters and teleport right into the boss's bedchamber don't really exist anymore.