At this point I recommend taking a day and doing the tests in #18 to get an overall idea of the problems you're having.
This info may influence the timing and extent of your repair/replace decision.
Just mapping the outlets may take you a day.
In each room you can say, e.g., upper NE room, 1st. outlet on NW wall, 2nd, etc., 1st on SW wall, ceiling light, and then map each to the load center.
Frinstance, index to circuit breakers for a split bus panel
a/c, 27 & 29
basement lighting, 25
basement west wall outlet, 20
bathroom GFCIs, 22
bathrooms, upstairs, 24
breakfast area outlet, 18
cooktop, 12 & 14
cooktop light, 17
room, 24
dining room outlet, 18
dishwasher, 19
disposal, 19
Dryer, 4 & 6
family room, 25
fan, kitchen, exhaust, 17
foyer, 21
fridge, kitchen, 17
front porch, 21
furnace, 23
guest room, 22
kitchen, 25
kitchen ceiling light, 20
kitchen overhead fan, 20
living room west wall outlets, 20
master bedroom, 24
mudroom outlet, 18
outside outlet, 18
oven, 8 & 10
pond pump, 26?
porch, screened, 25?
room, 22
sump pump, 21
washing machine, 18
whole house, 3 & 5
Breaker number/amps
15A: 20 to 25
20A: 17 to 19, 26
30A: 4, 6,8,10, 29
40A: 7, 9, 11 to 14
50A : 3, 5
* * * * * * * * * * * * * *
Circuit Breakers
3,5 whole house except dryer,
oven, stove, air conditioner
4,6 dryer
8,10 oven
12,14 cooktop
17 kitchen outlets, fridge
18 washing machine,
dining room outlet, mudroom outlet,
outside outlet, breakfast area
19 dishwasher,disposal
20 living room west wall,
kitchen ceiling light, kitchen fan,
basement west wall
21 sump pump, front porch, family room,
foyer
22 upstairs room, guest room,
bathroom GFCIs
23 furnace
24 master bedroom,
both upstairs bathrooms
25 family room, back screened porch,
kitchen, basement lighting
26 screened porch, pond pump, kitchen
27, 29 air conditioner
There's also a way to find the order of outlets on a branch circuit by using a 1 kw load (hair dryer, room heater, worklight) and a multimeter on the 200 mVac scale.
It's tedious but it works.