This is possibly the BG I like the most.
Five objectives, two teams.
I prefer getting a solid hold on the Lumber Mill because you can stand there and call incomings. Conversely the Gold Mine leaves you blind to what's happening.
Obviosuly you should capture your own 'starting' objective and keep a defensive force there or at least ready to intercept anyone going for it.
The Blacksmith in the middle is usually heavily contested. I'm not entirely certain why as it can be attacked from all sides and is the objective with the longest distance to another objective. In my mind it's best used to tie up enemy resources while your team holds on to Farm/Stables, LM and GM. A decent alternative is holding LM with an oversized force, and smaller defensive force at BS and an even smaller at Farm/Stables. At least if you have a decent number of people who can parachute down from LM.
As a tank I prefer defending LM for the duration of the battle, calling out incomings and notifying my team of the number of defenders at enemy held objectives. Well, barring GM which is invisible to be.
Being a random BG you can sneak in in full sight and snag Farm/Stables all too often, and swarming the enemy starting objective is quite often a solid response to them zerging one of our bases. You're not planning to hold it, just force them to return back home. In such a scenario a tank is quite useful suiciding at the enemy starting objective in a fruitless attempt to 'defend' it.