one nearly unstoppable tactic I never see anyone use...Drive Artillery upto the hill near the top, turn it backwards and have it face your base.
Turn the Turret around with the 'V' key and sight it on the GDI base. Level the turret and start hitting the refinery stack. You can even hit the War Factory and Powerplant if you move forward a little.
From a safe location, you can take out the GDI base. If you see Infantry or vehicles headed twords you, back off a little and blow them up as they crest the hill.
For added protection, bring a couple of infantry defenders (snipers, Chem troopers) and an engineer.
You can use multiple Artillery this way, just make sure you have someone to protect and repair the Artillery.
I haven't found a GDI version of this tactic yet.
Warning: Sometimes you will find yourself being banned for doing this or the server shuts down. It isn't your fault, some people just can't stand to loose.
[ March 25, 2002: Message edited by: eg ]