Yes, they should get XP for the match, but it should be split between the NPC + Share
Dragon Heist gives you the option to use XP-based breakthrough or milestone advance. If you choose to use the XP-based breakthrough (which clearly has), then you should split XP for the encounter as a whole.
Based on your description, I think the meeting in question is the
Troll and 3 revolver.
While your group did not really fight against
For lack of opportunity they participated in the meeting. In particular they stopped
3 revolts of dogpiling in Durnan while Durnan fought the Troll.
prevented PCs from being attacked by the
Finally, the module expects PCs to be grateful for
for their help in the meeting, and stabilized if they have been reduced to 0 HP.
One thing to remember is that the
The Troll regenerates again if it is not affected by fire when it is at 0 HP. Durnan has no way (as it is written) of inflicting that fire damage, so he needs help from somewhere to really deal with the fire damage. The module mentions Durnan dipping the Troll in lamp oil, but that should have taken at least one of his 4 attacks. If you allowed Durnan to throw the oil lamp. Y Make four attacks and then change the action economy of the fight.
As you mention, the
He is in the middle of his hit points when the match begins. This reduces (technically) your defensive challenge rating, which will then have an effect on your overall challenge rating. I have the calculations for this at home and I will unearth them (later). However, this adds additional complications to the calculation.
You always have the option of not dealing with this complication and simply grant the normal XP for the monster.
If we use the normal XP for a full health monster, the total XP for the encounter is:
1800 + 3 * 25 = 1875
If we assume that you are playing with 4 members of the group, then the XP of the match must be divided by 5 to obtain XP per player.
The would mean that each player should be rewarded.
375 XP for the match.
If it does not include
And treat them as two separate encounters, then they would get
18 XP each. (75/4 = 18.75 which is rounded to 18)
But did not really hit him? !!
Let's take this argument to the extreme. If you have a meeting configuration for your group that has 50 goblins, walk around a corner. Your group has a Sorcerer (or a Magician) with a fireball, who, by chance, has the initiative to go before everything else in the encounter (both the goblins and other PCs).
The Sorcerer takes advantage of the moment and launches Ball of Fire, incinerating all 50 goblins.
Should the other PCs in your group get a shared XP? Or should everything go to the Sorcerer?
In other words, if your group has a particularly low Dex PC that does not roll up enough to participate in the encounter (the rest of your group is efficient in killing a monster). Should that low Dex PC be excluded from the XP calculation?