in 2011 a friend and I forked the latest revision of TrinityCore 2.4.3 that marked the end of support of the version 2.4.3 by TrinityCore. You probably remember that.
We wanted to build a PvP server so we wrote a ton of fixes for spells and other stuff I don't even remember now.
It's now hosted on https://github.com/worm/Trinitycore_Azshara_2.4.3
I think there's some custom stuff among the commits you probably won't need but I'm sure you can sort out the good stuff. Of course if it's not too hacky fixed for you but I guess it can help anyway.