Ranks help, but for me; what I like most is that the battle roles are distinct from our class roles. Here we are disguised and act as Rohirrim in the kinds of roles 'heroes' would have in parts of set-piece battles with a known outcome for each part. For me, our class roles should be suppressed, even as dps (ie Vanguard). I find being a role player rewarding versus being a class player. In other words, take on the role of a squad/platoon leader, a battle engineer, or a morale officer.
Also, if you're going in as a scaled up character, try to get a partner for the 'solo' spaces. They really were balanced for duos. That said, some classes at 95 can still get good merit scores for some side quests.
The strategies and tactics vary from space to space and from group size to group size. Read up on them or get an experienced (see the post about someone being 6+) to show you the ropes.
"No sadder words of tongue or pen are the words: 'Might have been'." -- John Greenleaf Whittier
"Do or do not. There is no try." -- Yoda
On planet Earth, there is a try.
Indeed, in a world and life full of change, the only constant is human nature (A is A, after all :P).
We old vets need to keep in mind those who come after us.