We had a blast playing one of the scenarios in perilous dark with our rangers the other day and I thought I'd share our experience with this particular scenario for those interested. We were three players with one ranger each and their companions. We used the playtest rules that Joe made for ROSD so there was no group activations and skill rolls would be reduced by -2 if it had not been boosted. The skills were not relevant to this scenario either way. We did not use the 11+ rule for increased number of monsters. The scenario we chose was "the dog days" where the enemies will respawn if killed.
We started with 6 chronohounds as suggested for multiplayer mode.
During the first round we realized we had overestimated the rangers. They were still level 1 and the chronohounds are pretty tough! There is also no way to hide from them as they always have los.
So we decided to make some adjustments underway. Although we introduced the sixth hound by the end of turn one, we agreed that it should not respawn when it was killed. Another adjustment we implemented was that for each crystal we were able to destroy, one chronohound would not respawn. After an intense race to destroy all the crystals we were down to one lone ranger and one stalking chronohound. The ranger approached the last crystal, attacked and failed. He was then set upon by the last hound and killed.
Although it was very entertaining, fast paced and intense, we will probably decrease the armour value for the crystals from 16 to 14 next time we play.
In our experience the scenario was very smooth to port over to rangers, so for those wanting more scenarios for rosd, perilous dark is golden. For those with high level rangers, there is probably less tweaking needed as well. As for rewards, this scenario has no treasure, (Edit: if you destroy all crystals there is treasure to be had!) but a hefty amount of xp (50) for each crystal destroyed. So it can work as a scenario to boost xp and give the rangers an opportunity to skip to more difficult scenarios from the rosd campaign if they want.
To sum up how we will play it for rosd next time (3 players):
Skip the sixth hound for level 1-5 in multiplayer.
1 Chronohound will not respawn per crystal destroyed.
Reduce the armour value of the crystals to 14.