This client will work but it has limitations.
It won't display new items, dungeon, event or terrain.
It might disconnect when you approach newly introduced content.
It might stop function in one or the other aspects. (If autonexus doesn't kick in, it's your loss).
Some membrrs have reported instant deaths around the Dragon.
If you want to play safe, play vanilla.
All work was done by, and all fame goes to nilly, JustAnoob, and BananaNation for the awesome modselector and the codes.
In case you discover an irregularity you can report it here. I ask nothing in return, if you are happy with the post, drop a like.