Thanks for the feedback
So, I propose the following:
* Adopt all the talismans on my "definite" list, except
Water processing plant. I miscounted in my original post, so that's 28.
* For levels where I listed alternatives: choose "no diggers" for
Perseverance, "100% no bashers" for
LEMTRIS, "100% 1 basher" for
If at first you don't succeed, "no blockers" for
The Great Lemming Caper. (The alternative "6 skills total" doesn't enforce the "catch a climber" solution, and in fact still allows a relatively trivial variant of the blocker solution. So I prefer "no blockers", which does allow multiple solutions, but is more interesting than the blocker solution.)
* From the "possible" list, adopt "100% 10 builders" for
Get a little extra help, "100% no builders" for
Keep your hair on, Mr Lemming, "100% 2 minutes" for
And then there were four, and "100%" for
Poles Apart.
This gives us 32 talismans, a nice number to have given that there are 32 levels per rank.
* * *
We then need to choose which to make bronze, silver and gold. Looking through the list, I think the hardest talismans relative to a normal solution -- and thus the most worthy of being gold -- are these:
Cascade: Save 100%
Flow Control: Save at least 14/21
Come on over to my place: Solve with 1 builder
Creature Discomforts: Save 100%
The Steel Mines of Kessel: Solve with no blockers
Some others that, to me, are borderline between silver and gold:
ONWARD AND UPWARD: Save 37/40
Have a nice day: Solve with 5 builders
ROCKY ROAD: Save 100%
It's hero time: Solve with no climber
The Great Lemming Caper: Solve with no blockers
Final impediment: Solve with no bashers or diggers
Quite a hard choice
What about everyone else, which ones would you select?