Some stats from my current game:
I have no expansions enabled. This means no superweapons period, the end. Due to this, I focused primarily on fleeting.
Edit: 7/7 easier type computers, 18 controlled worlds, 23 worlds 'taken out of AI control, including one AI homeworld (so 79000 knowledge total, mostly in MKIII fleetships), 439 AIP, so this is near the end. I lost this one due to a few mistakes on defense, although incidentally, though I was in a position to potentially win this one. (I believe in playing iron-man. no save scumming >.<)
MkIII/IV unlocks:
Fighter
Bomber
Frigate
Bulletproof
Shield Bearer
Raptor
Space plane
MKII:
Gatling Laser
Total income: 2871M 2761C; 18 planets controlled. (total material income of 5632/sec) [mk 3 harvesters, no command station unlocks at all except warp jammer, 5 jammers operational right now, but I've not included the jammers, I only used raw positive flow income numbers, no other resource -'s.]
I usually use caps of MK III's and IV's on offense, caps of Mk I's and II's and starships on defense to augment statics (all MkI's) + miniforts + FF Mk I + HFF Mk I.
Mark IV refleet:
Tiangle ships:
Fighter (115200, 115200)
Bomber (825600, 115200)
M.Frigate (115200, 576000)
Total: (1056000, 806400) = 1862400 materials. With my current economy 330s (5.5 min) to rebuild just the triangle mark IV's.
Mark IV bonus (specific to my game obviously, note all teh wiki costs disagree with the game tooltip, I am using the game tooltip costs.):
Bulletproof: (404800, 58080)
Shield Bearer: (57600, 177600)
Raptor: (94080, 460800)
Space plane: (154800, 154800)
Total: (711280, 851280) = 1562560 materials. With my current economy 277s (4.6 min) to refleet just the bonus mark IV ships (4.6 minutes.)
To refleet all mark IV's takes 607 seconds minimum.
Mk III refleet:
Tiangle ships:
Fighter (76800, 76800)
Bomber (556800, 76800)
M.Frigate (76800, 384000)
Total: (710400, 537600) = 1248000 materials. With my current economy, 221s (3.7 min) to refleet just the triangle Mk III's.
Mark III bonus:
Bulletproof: (272800, 35200)
Shield Bearer: (38400, 120000)
Raptor: (63360, 307200)
Space plane: (103200, 103200)
Total: (477760, 565600) = 1043360 materials. With my current economy, 185s (3.1 min) to refleet just the bonus Mk III's.
A total wipe of the offensive fleet (Mk III's + IV's) here costs a total of 5716320 (5.7M) materials, This takes 1014 seconds to refleet, or 17 minutes.
Total Actual metal: 2955440 -> actual metal generated in 1014 seconds: 2911194
Total Actual Crystal: 2760880 -> actual crystal generated in 1014 seconds: 2799654
Crystal<->Metal conversion has no effect on time, in essence here since the numbers line up well and does not add time. Note that a cap of shield bearers are significnatly cheaper compared to most other ships. If I had another 'dps ship' in there, costs would be even higher.
On defense, at 440 AIP, I'll probably lose half the MK I + Mk II fleet caps, one or both of the miniforts, and almost all the turrets (1/4th of the Mk I caps per world; defending 4 worlds total), 2 Mk I FF and 2 MkI hardened FF (I am defending 4 worlds, and the defenses are spread relatively evenly amongst them, with the Mk I and Mk II ships respond to the 'crisis' as necessary.) I'll also typically lose 5 Mk II engineers and 5 rebuilders over the course of a fight.
Mk I turrets (no unlocks at all):
Note: 1/4th caps used for all turret calcs (24 for most, 12 for light/flak).
Basic (24): (28800, 19200)
Sniper (24): (14400, 72000)
MLRS (24): (43200, 9600)
Missile (24): (38400, 14400)
Laser (24): 9600, 43200
Lightning (12): 14400, 33600
Flak (12): 48000, 9600
Tractor (24): 28800, 144000
Miniforts (2) (100000, 80000)
FF/FFH MkI (4): (16000, 80000)
Total statics rebuild cost: (341600, 505600) = 847200 (.8M) materials. With my current economy, 150 seconds (2.5 minutes) to rebuild static D.
Defensive fleet loses: I assume I lose half of my Mk I and Mk II's during battle. It's kind of hard to tell because I have dynamic rebuilding going on. Losses may be higher or lower depending on how long the fight drags out. (note to simplify things becuase I am getting tired, I will assume MK I's cost half that of Mk II's; this is generally but not universally true [e.g. bulletproof fighter has metal cost of MkI 780, MkII 1580.):
Fleet ships:
Fighter: (28800, 28800)
Bomber: (201600, 28800)
M. Frigate: (28800, 144000)
L. Gattling: (40800, 40800) (272 cap)
Bulletproof: (104280, 14520) (88 cap)
Shield Bearer: (14400, 43200) (24 cap)
Raptor: (23040, 115200)
Sapce Plane: (38700, 38700) (172 cap)
Rebuilder (5): (5000, 10000)
Engineer Mk II(5): (10000, 5000)
Total defensive fleet rebuild cost: (495420, 469020) = 964440 (.96M) materials. With my current economy, 171 seconds (2.5 minutes) to rebuild static D.
Total defensive rebuild: 1811640 (1.8M) materials. with my current economy, 321 seconds (5.3 minutes) to rebuild static D.
Typically I'll move out to attack, and then the AI will flood in behind me. I'll defend with standard loses described above, and in the worst case scenario I'll lose my whole offensive fleet. Total time to rebuild all offense and defense: 7527960 (7.5M) materials, requiring 1336 seconds (22.2 minutes) at my current econ. The AI will usually have attacked again through freed threat at least once or twice in that 22 minute period, adding another 5 minutes to rebuild all my statics (partially rebuilt-offensive fleet on D helps clean stuff up much faster with significantly fewer losses, so I assume half of std losses). This brings me up to 27 minutes before I'm ready to move out again.
Edit: I'll try to look through another game i have later, if I have a chance. I was at ~450 AIP in this particular one (one home command dead), and it was starting to strain me pretty bad.
Edit2: didn't inclue starship losses on D. They typically aren't too bad though because engineers dynamically repair them. do lose a few here and there though.
Edit3: I had some fabs (2 i think) that were adding cores to the offensive fleet, but I lost them and don't have a save where I had them. Adding them in would also slightly increase refleet time. I don't think it was that significant though.