I do have reactive yes - earning them credits 1 mil at a time doing 100 ship kill massacre missions

Theres a hint in there somewhere for Fdev.
But you dont have to fit reactive - military will do with heavy duty for raw hp then you can use your packages as resistance buffs.
Regarding the powerplant - i hear you. In the old engineer system I lucked out with a +5% armoured pp. It meant i had less than full integrity but the power allowed me to vary my fit up a bit. However new 3.0 engineering much to my surprise armoured PP now has a power boost, and if you add the monstered effect it should result in about 42MW of power give or take (cant remember the exact number) at grade 5. Should be enough for most things while still retaining some hull.
New dirty drive rolls will negate the increased mass. Fully loaded im rocking 377m/s on boost and 18.3ly jump range. Unfortunately its just the re-work due to the engineering changes (not forgetting the npc buff). You can probably use a class 6 fuel scoop - I find its more than enough for getting around considering the jump range, by the time ive navigated the star the tank is full - it will free up a chunk of power too imo. I very rarely take this off myself.
With dirty drive 5 and drag drive experimental you should be able to keep up with eagles/vultures in terms of keeping them in view with some FA off and thruster tricks. PP, thrusters and shields were the first things I did to make the ship useable again. You dont have to go heavy tank by any means, although If im on a farming spree I will drop the scoop for cargo and my module reinforcements for limpet racks.
Its worth checking out the edshipyard beta for 3.0 it might help you plan your ship out a bit better but 2890 is much better you will notice the difference the next time trust me.
Also re-the hull tanking, still hoping some kind of regenerative hull (meta alloy hull reinforcements anyone) would be on the cards - it would give a use for enzyme missiles as a counter, plus allow for more varied builds using amfu and mrps. It would certainly bring more strategy to a fight imo.