My guide for twin peaks is essentially the same as Warsong Gulch, but I will give a few more pointers which are unique to TP but that is it. In the start always try to get across the water asap or else donot fight near the water, not being able to run away because of the bridge LOS or because water slows you down sucks major balls, so just avoid the water alltogether. If you can't get them to come into the water and basically have a stalemate, go over the water near the alliance graveyard and fight near the big rock there, alternatively you can make a demonic portal and port people over. If you are getting pushed back, try moving towards your middle graveyard while having your tank stand inbetween you and the graveyard so you get quick resses. If you really cannot hold it anymore consider going back into your base and up the ramp, especially with knock-back classes and good path blocking it is pretty easy to defend a tank there while your spriest/mage/lock try to kill the EFC.