Its easy.
On l2off in the middle it moves to the lair. Orfen doesn't get full hp but being healed by minions when being hit. So when you reach her she will be still ~middle hp.
You can cancel its teleport to the lair by debuffing a boss with a high level char during the fight. Then the boss will cast raid curse on a char instead of teleporting to the lair and can be easily killed ;)
Old lucera is garbage. New one isn't good too and has no source code available.
Acis is obviously better. New acis revs are unstable though and have tons of bugs. Old ones are nicely done if you fix some hundreds of easy bugs there.
Rev133
-added support of belts, bracelets and "magic runes". Also added shirts. New items are available in luxury shop.
-some minor fixes I don't remember which they are ;)
u can't use interlude client here unless you fully rewrite packetwork back. It is pointless anyway since you'll have to port content from freya to il client.
Download apache ant itself and put it somewhere (e.g. "C:/ant/")
Then go to windows Environment Variables, in system variables edit "Path". Put there ";C:\ant\bin"
Then use bat file or eclipse to build with ant.