You should probably read the thread and find that everything you're suggesting has been brought up before.
I just dinged 80 so my gear sucks, and the only 2v2 partner I could find for this week was a death knight (worse gear then me, but higher DPS and survivability). So, I found droping a circle behind an object, usually out of LoS, (except org of course)run out, and DoT everything I can before I get low or need to escape works great. Once I do port, the opponents cannot do anything except run after me (no LoS means no CC or quick recovery). This gives me enough time to use a bandage, and sometimes I can start pillar humping while my partner goes after the healer or other DPS.
The great thing is, if/when they switch to my partner, I can start to fear one while re-applying my DoTs. This may seem like a bad strat, but it is an effective game of attrition - buying time for DoTs to do damage and for my CD's to reset.
In world and BG's, dropping the circle someplace that provides cover or LoS is very effective. You can basically "disappear" if you port behind a pole or wall or tree, etc. Keep in mind that after you port, you can usually get a fear in if used right away. So make sure that when you port, you are in range to get a fear off.
Also, the port is perfect to use as an escape. I usually try and use the following abilities to give me breathing room in PvP. And the order I list them is the same order I try and use them if available. HoT, DC, Fear, demonic circle. While this has so far proven very effective, I am not convinced it is the best. Anyone else use a similar rule? Keep in mind that I do change the order on occasion depending on the situation.
I have not tested, but have noticed, that when a mage frost novas me to the ground and I port, I am still frozen (not deep freeze, but stuck and unable to run). Anyone else notice this?