Currently, the rate of getting a molch pearl is as follows:
pearlModifier = (hunterLvl + fishingLvl)/8
chance = (40 - pearlModifier)
This chance is further reduced another 15% if you have the vote bonus active, meaning that at level 99 hunter and fishing you could expect to get a pearl every 16 catches, or every 13 if using the vote bonus. At 80 fishing/hunter, it'd be about 1/20, and 1/17 is using the vote book. This means that if a player had 99 hunter and fishing, and used the efficient strategy stated on the wiki to catch 1600-1800 fish an hour, they would obtain 123 - 138 pearls an hour, which is far greater than OSRS. I'm not sure if this is actually viable in practice, but even if you got 1200 per hour at 99 hunter/fishing, it should still be around 92 pearls an hour with the vote bonus.
- J boogs, MT, Formula One and 2 others like this