The straight on approach only works for the ubertwinks, and the AoE approach has never been a good one for beholders. Web does work nicely on all but elite, PK has always been the spell of choice (I hear they're afraid of thumbtacks) and I've seen several people handle them without drama at level. I've only seen that area go really poorly when someone zergs into the middle of 'em all and gets 'em all active at once, really.
Now, the big combat just before the three named is another matter...I've seen that go poorly with even a well equipped party, if the baddies get people split up and not concentrating damage properly...again, party tactics and communication generally rules the day.