Priorities? What would be some useful chains?
We probably shouldn't be aiming for chains of wonders, or even individual wonders really. The best strategy is to see what happens as we go. If we find stone, the Pyramids might be attractive. If we find marble, perhaps the Oracle or Great Library. But certainly we should take the benefits of each wonder as they stand and not rely on getting "chains" of wonders. This invests too much of our time into wonder-building at the expense of expansion, which doesn't leave us in a good position. (Especially in the fairly likely event that one or more of our "chain" of wonders is snapped up by other teams.)
If we get great lighthouse then we have to get temple of a. However that would change our tech plan so we could get harbors
Whoah... why would we have to get the Temple of Artemis if we got the Great Lighthouse? The Great Lighthouse is awesome on its own, and there's no need to try for a double-whammy. (Besides, I find that the Temple of Artemis really doesn't give all that much of a boost, and it's incredibly expensive without marble.)
Also, there's no need to change our tech plan to get Harbors early with the Great Lighthouse. The Great Lighthouse is a wonder that's good enough on its own merits that you don't need to change your whole game plan to try to squeeze a little bit more out of it.
Oracle is obviously a #1 priority. But wouldn't team 5 have an easy shot at it?
Not really. There's no guarantee that Team 5 will even research the early religions anyway - we don't know their gameplan. Of course, it's a possibility, but we can't say for sure at this stage. All that we know is that the opportunity is there for them.
Certainly, we're not planning on researching to Priesthood until we have at least 6 other early techs, so we may be a bit late for the Oracle. But still, it'd be worth making a shot for it if we think we'll have a chance.
Is anyone here a micro manager? We need one. I am not a math man im affraid
*Puts hand up*
I suspect that most of the higher level players (and probably some of the lower-level players too) are micromanagers, so we'll have no shortages there.