Only use I see for sidhe lord is if you need the ability to cast lightning bolt early on. They are cheaper than the 390gp one if you are just using them in the back to cast direct damage. Honestly though, they are pretty weak but then again most nations have one or two pretty useless commanders.
I suppose you could use a strategy of building a Sidhe Lord every turn early on while researching Evocation up to lightning bolt and then swarm the neutrals with them. Doesn't really work against heavy cavalry but it would route infantry quickly.
Oh, and the best use I found for the doggies is as patrollers. One game I was being harrassed by Tien Chi concubines in my capital but a dozen of the dogs caught them right away and tore em up good

I wouldn't rely on them in combat but as patrollers they fit the role perfectly. If you have a choke point on the map just set them to patrol there and no scouts will get through.
[ May 03, 2004, 10:46: Message edited by: sergex ]