It's kind of simple but I'll try to explain it further.

Scion are all foes.

The Fortress primarily has the only conjurers around and the occasional duergar or drow gone goodie. So... Those times you bump into a Sylvan near the Fortress they're either waiting for one of the above or waiting for Scion to go try to pick off someone from the Fortress or recover the scepter. It's easy as that.

We won't go into how if the Grove has the scepter there's almost no point in waiting near the Grove because no one from Scion will come. Independant conjurers and such aren't as easily tracked down as scion or fortress people. Ask Annalena I'm sure she and many of the warlocks can attest to their conjurers and lone dark elf being attacked very frequently by Sylvans. What *is* interesting is that Scion really has it easy by comparison. You don't have easily camoed/thorned/snared areas all around your cabal but I've yet to hear anyone from the fortress cry foul. *knocks on wood*

I agree the interaction between cabals is pretty limited with regards to fighting. Scion is on a downswing at the moment. But honestly you were one of the few who were giving it presence. Horacius (spellcheck) and a bunch of others are as bad as Naz and his blue moon appearances. (read eq horders in essence) It's just sad that the ones that make their presence felt, fight the fight and do their damndest get disheartened, frustrated and call it quits.

On a side note, Nerylana did attack that healer for sancing her and the brawl; as unconventional as it was with all the parties involved, was fun and chaotic. Good luck with your next