an_idol_mind
Explorer
I finished up an on-the-fly conversion of Night Below: An Underdark Campaign in Pathfinder and it worked well.
My thoughts on that campaign are here, but as to your question specifically...
I found that early-level Pathfinder characters are much stronger than their 2nd edition counterparts. In a campaign where there were supposed to be 6-8 total characters, the PCs managed just fine with a party of four for most of the early going. It evens out by mid-levels. High-level play gets a bit wonky, since AD&D had a more-or-less flat power curve (except for spellcasters) after level 10 or so. A high-level module might toss a marilith or balor at level 12 characters, which would usually mean a TPK in Pathfinder.
So I guess for low-level stuff, assume that the PCs can get it done on the lowest level recommendation. On mid-level stuff, go for somewhere in the middle. On high-level adventures, be prepared to swap out monsters on the fly.
I'd also recommend cutting down on the treasure given away. AD&D often gave away crazy amounts of gold because those editions had gold equaling experience much of the time. I cut gold rewards by 90% and the players never complained (until they found out that I had been removing gold from the adventure).
My thoughts on that campaign are here, but as to your question specifically...
I found that early-level Pathfinder characters are much stronger than their 2nd edition counterparts. In a campaign where there were supposed to be 6-8 total characters, the PCs managed just fine with a party of four for most of the early going. It evens out by mid-levels. High-level play gets a bit wonky, since AD&D had a more-or-less flat power curve (except for spellcasters) after level 10 or so. A high-level module might toss a marilith or balor at level 12 characters, which would usually mean a TPK in Pathfinder.
So I guess for low-level stuff, assume that the PCs can get it done on the lowest level recommendation. On mid-level stuff, go for somewhere in the middle. On high-level adventures, be prepared to swap out monsters on the fly.
I'd also recommend cutting down on the treasure given away. AD&D often gave away crazy amounts of gold because those editions had gold equaling experience much of the time. I cut gold rewards by 90% and the players never complained (until they found out that I had been removing gold from the adventure).
