I got a couple suggestions:
- I wouldn't use bears to guard your refineries. I would send them to both oil refineries and try to kill their engineers first.
- I would also add a tesla trooper if you want to try to cap their conyard. If the player is any good, he will back up his MCV and you won't be able to cap. If you have a tesla trooper, you can paralyze his mcv when he backs up.
- The next step after this strat is to get a 3rd refinery by moving your MCV near another ore node.
