Just some words of advice: If you're not an old mech3 multiplayer vet...don't let yourself get discouraged.
Just remember a few basic things:
1) Always keep moving and in a lateral direction (never straight towards the enemy)
2) Use the radar map to see enemy positions to help you with your lateral movement and to see direction of incoming missiles
3) Your lancemates will follow you faster since their AI has also been adjusted, use your team, when they have followed you in a lateral direction they will become positioned to attack the enemy with a "firing line" formation, once this formation has happened tell them to attack and go help them. They will also shoot more accurately and cycle weapons faster...but so will the enemies!
Re-map the following key: "4" to "attack selected enemy", this way you can go quick: select your enemy, then F11...1,2,3,4 (lancemate, lancemate, lancemate, attack)
Learn how to circle-fight! Don't worry, the smoke jags will teach you!
Mech3 CampaignAI Enhanced now available on the downloads page, enjoy!