No offense meant, but it's rather straight forward:
o If your abilities only protect you against something specific, you get a +2 discount. If they protect you against
everything except something specific, you get nothing.
o If the Catch is bypassed by something that anyone could reasonably get access to, but usually doesn’t carry on them (like cold iron), you get a +2. If it is bypassed by something only a rare class of people in the world have (like True Magic), you get a +1. If it is bypassed by something only one or two people in the world have access to or could produce (like a Sword of the Cross), you get nothing. Even the mere presence of the thing that satisfies your Catch will cause you discomfort (and may be grounds for a compel or something similar).
o If almost anyone with an awareness of the supernatural knows about the Catch or could easily find out (like from the Paranet, or Bram Stoker’s Dracula if you’re a Black Court vampire), you get a +2. If knowledge of the Catch requires access to specific research material
that could be restricted (like a wizard’s library), you get a +1. If knowledge of the Catch requires knowing you personally to learn about it (like the effect of Judas’ Noose on Nicodemus), you get nothing.
The first "plus" is against everything but, or just against that one thing.
The second "plus" is availability of the catch item.
The third "plus" is the "availability" of knowledge against said catch.
Cold Iron is generally +3. Nothing because it's against only cold iron, +2 because iron/steel is *very* easy to find. Grab a crowbar, or tire iron (tehehe). And +1 because faeries try to hide that knowledge, and varying legends argue it (some say iron, some say silver, et cetera).
I'm just assuming in all these, that the catch is protection against everything but listed items.
Weapons forged with Magic: +0 (most likely), +0 (this is going to be rare, it's not common at all), and +??? (this depends on the creature, really) which totals a +0 catch rebate for this. Maybe more, if it's common knowledge.
Suspension: +0 (again, most likely), +1 (it's *easy* to do, but setting it up may not be, feel free to argue), and again +???, is it common knowledge? So, this is +1-2. Maybe more.
Running Water: +0 (I sense a theme), +2 (easy, very. Got a shower? river? fire hydrant?), +??? (is it well known?) This one is probably a +3, as the knowledge may be available.
meteor: +0, +0 (this can be argued but it's going to be very hard to find. Very), +???
Left handed people: +0, +1 (well, they are common enough, but not *all that common*), +0, I'm sure this is obscure. Very. I could be wrong. So that leaves this at a +1.
-ber born people: +2 (you can very much argue only protects them from people not born in those months), +2 (one out of three people, statistically speaking. VERY COMMON), +0 (maybe more, but this would be very uncommon in my reckoning. as always, depends)
So, why people born in the cold months?