found this on forum:
That's why I prefer L2JServerFrom what I've known L2jServer has made great progress on how skills works on High Five branch.
There are changes that are pretty important compared to branches prior to High Five.
-Melerix fixed a lot of the broken formulas based on retail.
-Zoey76 totaly reworked the whole skill and effect engine.
-And latest Zealar is polishing whatever skills need to be reworked to match retail.
When the above changes occurred of course there were glitches
and take my word players will be unhappy even if you use retail files,
saying this on retail was working like that, etc.
I have seen many sources during the years including L2Universe, L2JS, L2-Scripts, L2J-Frozen, aCis, *fork* and GodWorld.
L2jServer has the most retail skill engine so far.
Cheers,
Bencratus