EmDo Expansion update - part 2

I just posted some thoughts about the EmDo expansion. The purpose of this post is to start revising the tech cards and stuff that I would like to include in the expansion, and some of the specifics.

Cross-type Techs
Level 1 (2 different required planets)
Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Colonize/Water (can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Advanced/Metallic

Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Produce/Food(can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Advanced/Metallic

Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Research/Silicon (can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Fertile/Metallic

Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Trade/Silicon (can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Fertile/Metallic

Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Warfare/Iron (can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Advanced/Fertile

Double Time
Action: Play 2 more cards during your Action phase this turn.
Symbols: Survey/Iron (can discard this card as if it were a resource in your Empire)
Cost: 3 Research
Pre Req: Advanced/Fertile

Level 2 (3 different required planets)
Synthesize
Action: Search your deck and discard pile for any card, put it in your hand, and shuffle the rest to create a new deck. Play another Action.
Symbol: Any Resource (can discard this card as if it were a resource in your Empire)
Cost: 5 Research
Pre Req: Advanced/Fertile/Metallic

Deep Space Probes
Action: Search the Planet deck and discard pile for any card, shuffle the rest to create a new Planet deck, and put the chosen card on top.
Symbol: Any Resource (can discard this card as if it were a resource in your Empire)
Cost: 5 Research
Pre Req: Advanced/Fertile/Metallic

Warfare Techs
Level 1 (cost 3 Fighters - Maybe OR 3 Research?)
Improved Colonize
Action: Same as Improved Colonize
Symbols: Colonize/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Fertile

Improved Production
Action: Same as Improved Production
Symbols: Produce/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Fertile

Improved Trade
Action: Same as Improved Trade
Symbols: Trade/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Advanced

Improved Research
Action: Same as Improved Research
Symbols: Research/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Advanced

Improved Survey
Action: Same as Improved Survey
Symbols: Survey/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Metallic

Improved Warfare
Action: Same as Improved Warfare
Symbols: Warfare/Fighter (can discard this card as if it were a fighter in your Empire)
Cost: 3 Fighters
Pre Req: Metallic

Level 2 (cost 2 Destroyers?)
Cryptography
Action: Draw 3 cards, then return up to 2 cards from hand to the Stacks.
Symbols: Fighter/Fighter (can discard this card as if it were 2 fighters in your Empire)
Cost: 2 Destroyers
Pre Req: ??

Other New Techs
Wealth of Knowledge (?)
Permanent: Your standard Survey cards can be used to Boost or Follow any Role.
Symbols: None - Permanent
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Metallic

OR

Wealth of Knowledge (?)
Action: Your standard Survey cards can be used to Boost any Role this turn.
Symbols: Survey/Iron? Survey/Fighter?
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Metallic

Thorough Scanning
Permanent: You may look at 2 fewer planets per Survey Role. If you do, keep 1 additional Planet.
Symbols: None - Permanent
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Metallic

Biosphere
Permanent: [Silicon Resource Slot] [Iron Resource Slot].
Symbols: None - Permanent
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Fertile

Scientific Method (Discovery?)
Permanent: You may purchase 1 additional Tech card each Research Role. Pay for each card separately (both cost and pre-reqs).
Symbols: None - Permanent
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Advanced

OR

Scientific Method (Discovery?)
Action: -1 Research cost for each Tech Card you purchase this turn. You may purchase 1 additional Tech card this turn. Pay for each card separately (both cost and pre-reqs).
Symbols: Research/Silicon? Silicon/Fighter?
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Advanced

Specialized Production
Action: Choose a resource type. Collect 1 Influence for each resource of that type you produce this turn.
Symbols: Produce/Food? Produce/Fighter?
Cost: 2 Destroyers? 5 Research?
Pre Req: 2 Fertile

Military Tactics
Permanent: -1 to your Warfare costs.
Symbols: None - Permanent
Cost: 2 Destroyers?
Pre Req: 2 Metallic?
[This is similar to - probably worse than - Scorched Earth Policy I thought it would be good if it costs Destroyers rather than Research)

Fighter Upgrade
Action: Discard X Fighters, collect 1 Destroyer [maybe X = 0]. Discard X Destroyers, collect 1 Dreadnaught.
Symbols: Fighter/Fighter?
Cost: 2 Destroyers? 5 Research?
Pre Req: ??