1. Try "Shield conversion-front". Yes, i know why omni is better and blah-blah-blah. +100% in coverage, + 100% raising speed, -50% flux upkeep. It is an "accelerated shields", "stabilized shields" and "extended shields" in one bottle for a minor OP price. Does not work on all high-tech ships, but fit many of them. Was tested on tempest, medusa, aurora, odyssey and paragon. Works.
2. Some smaller crafts does not need a "hardened shields". Why? Coefficient are multiplicative. Some hight tech ships already has good damage-to-flux ratio, so improving it won`t help a lot, while eating a lot of OP. That is mostly said for medusa, shrike and tempest. Larger ships DO need a "hardened shields".
3. You need dissipation more than capacity.
4. Beams may not be a good idea to spam everywhere. Still using them can improve survivability, especially with an "advanced optics". But that means a team work of distraction and attack crafts, solo-beams won`t kill a lot. Except of tachs and phase lance, but they are not-that-flux-efficient and can overflow yours capacitors faster than enemy fire.
5. Sometimes you do not need to install rockets at all. Most of the rockets are single use, or to weak to make a damage. As high-tech ships are designed for longtime battles (if not phase ships), their few (and small) missile mounts does not help a lot, but eats OP that could be used as extra flux dissipation or additional hullmod. Astral and shrike are exception. And phase ships of course.
6. High-tech crafts have few possibilities to mount ballistic. Try needlers to crush enemy`s shields. Energy mounts are really bad at this because of bad flux-to-damage ratio or low DPS.
7. "Larger" are not always "better". There are not so big diversity of energetic weapons. Sometimes it is better to mount small weapon on a middle-sized mount or medium-sized weapon on a large mount. Or even don`t mount anything to spare some OP for dissipation.
8. Autopulse laser, ion pulser and burst lasers of all sizes DOES get benefits from "expanded magazines". May be extremely useful on short, but devastating strikes. Useless on long sustain battles, though.
9. Of course do not forget to install ITU, solar shielding and other good stuff.