Recharger/energizer and regulators in one module. Done and done.

That's not a bad idea except, what would it count as module slot allocation wise high or low?

How about making the fitting a little less intensive? Scraping up CPU/PG on a scout is hard enough as is.

Other than that I agree the modules need a buff.

That's not a bad idea except, what would it count as module slot allocation wise high or low?

I think the shield regulators need to have their stats doubled (I did some number crunching and decided 100% increase to shield regulators was too much and toned it down to a 60% increase).
So basic would decrease shield fully depleted and depleted charge times by 15% rounded down from 16 (currently is 10%), adv 30% rounded down from 32 (currently is 20%) and complex 40% (currently is 25%).

To balance this out shield regulator fitting costs should be increased having their cpu increased by 30% and their pg doubled (100%). Therefore basic shield regulator fitting cost would increase from 11 cpu and 1 pg to 15 cpu and 2 pg, advanced 24 cpu and 2 pg to 32 cpu and 4 pg, finally complex 35 cpu and 3 pg to 46 cpu and 6 pg.

That would help counteract the shield extender stacking penalty as well as make shield tanking viable yet not over powered. Hence bringing shield tanking on to a level playing field when compared to armour tanking or duel tanking.

Now from my point of view with the time to kill being so fast, you are more or less likely to die before you can get back into cover to allow your shields to regenerate, even if you do make it back into cover you will most likely have fully depleted shields therefore having to wait out the fully depleted shield timer plus the additional stacking penalty. Which of course is what shields are suppose to do though it could be a 10 second or more wait, which when compared to armour module repairers shield recharge rate seems godly. Though when you take into account the advantages of triage nano hives and the god like repair tools it's hardly what I would call an even playing field.

Rant over.

Just my two cents worth.

I didnt even read op.

They are worthless. Maybe the most worthless thing in this game.
Get rid of regulation add a secondary 5% armor buff.

Make a regulator variant that works like an energizer, taking a percentage of base recharge rate for a larger regulation bonus.

If you combinded all three so you essential had a "shield regenerator" module i would make that a PG intensive low slot module. Essentially power surging to jumpstart recharge and bring you back to max buffer quickly. This has the added simplicity of managing 1x buffer and 1x regen module much like how the armor tankers do now.

Recommendation....
- Keep the extenders resource cost the same, give a 10 HP buff to each level and retain the stacking penalty as noted in 1.7.
- Combine the Energizer/Regulator/Recharger into a "shield regenerator" that is resource intensive but practical (probably around the drop uplink cost range).

That's not a bad idea except, what would it count as module slot allocation wise high or low?

This is an awesome idea if CCP were to create a module like this shield regulator and Energizer/Recharger rolled into one, though we may only be able to access it we Caldari loyalty points.