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Correct procedure assembling the front brake's caliper

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deltarider:
I'm reassembling the caliper and I'd like to learn the correct procedure. I'm using conventional DOT 4 brake fluid.
Prior to sliding the piston in, you need to smear some brake fluid in the cylinder. I understand that.
In an ideal situation do you:
a) also wet the rubber seal with some brake fluid?
b) also wet the seal's groove with some brake fluid?
c) also wet the piston with some brake fluid?
Reason I ask is, that I assume it's best to have as little brake fluid (hydroscopic) outside, to prevent attracting moisture and things getting dirty.
 
Silicone grease like Ate is in principle only applied on the sides of the pads, to prevent sqealing.
In the situation shown in the pic, so with the piston fully in, is it OK to smear some silicone grease in the area around the bore (indicated by blue arrows)? Will it prevent dirt build up?

To prevent future seizures, is it OK to smear a little copaslip on the bleeder's thread, or is there a risk you will contaminate the brake fluid?
How about the threaded end of the fluid pipe, that goes in top of the caliper?
Thanks in advance.

deltarider:
I remember having read positive reviews here on SBS organic brake pads (Oddjob). I assume they were the 'street' and not the 'racing' version. Correct?
https://www.fourdeelshop.nl/cb500/remmen-4
Further down in the pic you'll see an aftermarket master cylinder. I've heard good things about it. Friends informed me that performance is better than the OEM. I'll have the single disk one (€ 55,-) and will let you know how it performs. BTW, you can replace that nasty black cap by your old original one.
Thanks for your wisdom.

McCabe-Thiele (Ted):
I pretty much assembled mine as per your post DR except I used Silicone grease during assembly as I was using Silicone Brake Fluid.

Pads like tyres are often down to personal choice - I have Brembro Carbon/Ceramic on my 400 & 500.

DomP:
I've always used red rubber grease on orings including brake piston seals, copper grease on threads and backs of brake pads.

Bryanj:
Coppaslip on threads is fine, fluid on seal and piston sides

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