I believe this was somewhat fixed in one of the patches. If your game is fully patched, you should be able to safely return there and then return to the world map and still have Floyd's Beacon, by using the teleport mage in the Mage's Guild after defeating Rixian.
As for the party, the only party-specific interaction I know of that gets you something is that you would need Luciana to buy the Universalis Dogma book, which is one of the three books you can translate for that translation quest, but it's extremely expensive, so there's not much of a point in getting it, since you only need to translate one. So other than that, you would just bring your strongest party for the fight with Evander and Orghandi.