You can pretty much do whatever works for BGs as far as strategies go.

As far as killing/surviving, Make a button to heal your main character, and make a chain heal button to heal your entire party (Have them cast it on themselves). Be sure to get an IWIN button (Elemental Mastery+Lava burst+Spell power on use stuff+Rockets etc.) to kill important enemies. (vehicles and flag carriers)

For the 40 man BGs, you're better for defending if you're not sure what you are capable of.

For AB and EotS, just move to bases where your teammates are not already at in high quantities, and never assault a base with more enemies present than you can handle without the help you need following you.

For WSG, DO NOT CARRY THE FLAG. Unless your team is competent at defending, (unlikely) avoid carrying the flag, because if your team has the flag, there will likely be no one competent to kill the enemy flag carrier.

Have fun in SotA, it just sucks.