Mass-effect – What are the advantages and disadvantages of each choice for ships doctor

I know this is only a partial answer but I'm looking for how much experience and creds you get from gold too so I thought I'd pass the info along.

Bronze: About 150,000 experience, 15,000 credits.
Silver: About 200,000 Experience, 30,000 credits.
Gold: Unkown

As far as galactic readiness goes, I haven't really been watching but it's usually around plus 3% each time I think.

I found this list of biotic and tech combos on the Bioware forums.

Biotic Combos

• Singularity --> Warp, Throw, Shockwave, Charge, Nova, Cluster Grenade, Reave

• Stasis --> Warp, Throw, Shockwave, Charge, Nova, Cluster Grenade, Reave

• Pull --> Warp, Throw, Shockwave, Charge, Nova, Cluster Grenade, Reave

• Warp --> Throw, Shockwave, Charge, Nova, Cluster Grenade, Reave

• Lift Grenade --> Warp, Throw, Shockwave, Charge, Nova, Cluster Grenade, Reave

• Shockwave (only with Rank 6 Lifting Shockwave evolution) --> Warp, Throw, Charge, Nova, Cluster Grenade, Reave

• Reave --> Warp, Throw, Shockwave, Charge, Nova, Cluster Grenade

Tech Combos

FIRE EXPLOSION - Can be set up by: Incinerate, Carnage, Inferno Grenade, Incendiary Ammo

• Can be detonated with any Biotic/Tech/Combat powers that can deal direct damage (except for the powers that are used to set up the combo).

• Effect: Enemies effected by any of the fire based powers, cause an AoE fire explosion, once they are killed by a direct damage power. The effect is similar to blowing up Pyros with Overload in ME2.

• Note: Enemy MUST be killed by the second power, in order to cause a Fire Explosion. E.G. it will not work, if an enemy is hit by Incinerate --> Overload, and still has HP left after that. So, in this case, Overload would have to do sufficient damage to outright kill a burning enemy, in order to cause a Fire Explosion.

CRYO EXPLOSION - Can be set up by: Cryo Blast, Cryo Ammo

• Can be detonated with any Biotic/Tech/Combat powers that can deal direct damage.

• Effect: Frozen enemies killed by damage based powers, cause an AoE cryo explosion, freezing any enemy that is nearby.

• Note: Same as Fire Explosion, frozen enemies MUST be killed by the second power in order to trigger Cryo Explosion.

TECH BURST - Can be set up by: Overload, Energy Drain, Disruptor Ammo, Sabotage

• Can be detonated by any Biotic/Tech/Combat powers that can deal direct damage (except for the powers that are used to set up the combo).

• Effect: Enemies effected by electricity based powers, discharge multiple electricity bolts to nearby enemies, when hit with direct damage powers. Effect is similar to Overload's Chain Overload upgrade.

• Note: Unlike Fire & Cryo Explosion combos, this one doesn't require an enemy to be killed by the second power. E.G. enemy hit by Overload --> Incinerate will produce Tech Burst, whether he is killed by Incinerate or not.