1) If you see a building getting constructed, range attack it while closing in. It will stop building (unless a Journeyman/Engineer is helping) Critical strike/Venomous strike will deal damage overtime, so it will not continue building for the duration of the attack. (Unless this got fixed in some patch? can't confirm this really xD I still do it, but paying attention whether it works or not)
2) Get 2 dagger runes in your inventory list (if you are lucky enough to get them, or buy them if you don't mind doing so) and use them with a strenght build character and predator/savage rage = HOLY CRAP DAMAGE O_o. (The last attack of a flurry will do a real shitload of damage)
3) Use CHARGE on little slopes to be launched ahead. Watch some replays of me if you don't understand what I mean xD. If you want.
4) Never give up, and don't go crying "zomg we cant win lets concede". If you surender coz you're losing, then you miss the point of this game. ITS ABOUT KILLING THEM AND ENJOYING THE BLOOD SPILLING OUT OF THEM AS YOU ARE OWNING THEM WITH A HUGE SMILE ON YOUR FACE! BWHAHAHAHAHAH!
5) Ah, And don't think that enemy malphs are the end. They're impressive, but seriously, they have a 2-3 second delay after each flurry and you can block at least one hit you should block the last one, since that one deals a shitload of damage. Evade the other 2.
But you knew all this ofcourse.
Servitor.