You can't expect us to list in this thread or any other, over 1000 monsters and their resistances. It won't reach everyone. For instance I already explained on the forums kazilions times that Demi Resistance is just made up name, the real name is "Warrior Resistance + Sura Resistance + Assassin Resistance + Mage Resistance", all rolled into one. As there is no monster that is a character, it is just a pvp bonus. Yet despite the many times I told so, you didn't know.
No one is asking you to list ever monster there is in the game and which resistance is good vs it. In my opinion this a totally possible task. For example you do it like this:
1. make a poll including all the maps/dungeons of this server. This would have the purpose that the players can vote which map they want to know specific resistances for specific monsters the most. Once lets say the top 8 voted maps/dungeons have been selected you start a new poll with all the monsters from each of these maps.
2. New poll for each monster of the top voted maps. Now again lets say the top 8 most voted monsters for each map will be selected. You could provide us with info about resistance that works against them.
This way a lot of irrelevant maps won't cause you any work because lets be honest....dragon valley, map 2, map 1, probably desert and ice land ore not relevant to this list because they are so easy with all the mechanics in the game right now. Also runs where resistance does not work at all can be left out anyway. the way I see it this is not as much work as you state. I would gladly take the task upon myself so you don't have to deal with it, but I doubt you want to give code to someone who is not in the Tec-team.
Different approach:
Make a new forum post and let players edit a list of maps/monsters with which resistance they believe work on them (maybe you can give power do only a few willing players who are experienced enough to fill these out). You could then look at the list and update it once a week by correcting and confirming their input.
""Demi Resistance is just made up name, the real name is "Warrior Resistance + Sura Resistance + Assassin Resistance + Mage Resistance""
Not everyone reads every post in this forum. As long as no list with information like this exists you can NOT expect people to know stuff like this. Every one hears something somewhere and if it sounds good they believe and spread the news. Who would not think, that fire res works in Hell run. It sounds logical. But no not all the monsters and most important: the strong monsters in this run do not interact with fire resistance.
So please don't blame the players for "false rumors" they just want to spread information and don't have the intent of misinforming.
This task is not impossible and asking the community for help is not a bad think. We also would like to know if we are right about this kind of stuff and will be eager to help. 
Kind regards