Few questions to answered...
Firstly, nukes do affect stuff underwater, many times have i nuked a commander hiding in the water
You most certainly can build any AA structure whilst under water, but it floats, and is thus acessable to be attacked by water, land (if in range) and air units.
As for economy, still upgrading support commanders with resource allocation is my fav, the are mobile and can save you when you base is down.. instead of building mass fabs and pwer gens next to each other, build them so that they are spaced with mass storage (next to the t3 fabs) and energy storage (next to t3 power plante) these increase the output of the plant they are attached to, and when 1 goes up, the rest dont
![Smile :) :)](/styles/default/xenforo/vbSmilies/Normal/smile.gif)
(downside to tis is it eats up your units)
Commander teleporting: only found 2 uses: 1st, if you scout a huge attack that u cant get away from, teleport him off, it'll have time to charge, but if it's been scouted, you could probably just run for it, and secondly, and this usually puts a smile on my face when calculated perfectly.. teleport him into the middle of an enemy base and watch him annihilate it
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
(only works in games where the game keeps going when the commander dies) can also ammass an army of support commanders and do this, usually scares the poo into your opponants
and lastly: rushing.. not always employed by ppl that want to win.. no tbh, i AM a bad looser, but i really dont mind loosing if the game was at least enjoyable... i rush, i do it a lot, air or ground or both, main reason is to stop the oncoming rush my way, if i dont detect an oncoming rush, i just halt the units. But the best game i have played are where me and my opponant have rushed, and we have also upgraded stuff at almost an identical time.. most t1 rushes are stopped by a couple of t3 bots, but when these pour out at the same time, rush just gets halted middle map again, and then stuff like artillery is in use.. and makes for a much more interesting and fun game
(and on a last note.. i have metal fatigue.. sup com doesnt remind me of it at all.. hardly any units in MF and its all massive bots that can be upgraded to specific things.. although the races do seem 'fairly' similar)