Alternate pricing for Super ST
Why an Alternate Pricing
GURPS Supers introduced a new modifier for the ST attribute, called Super ST. This expanded on a modifier introduced in GURPS Powers, Super Effort Lift. Both of these modifiers seek to solve the disconnect between the way GURPS handles ST and the way super-strong characters behave in comic books, by providing a discounted way to spend one FP per second for mighty feats of strength (catching a thrown car, holding up a collapsing building, etc). This is to make characters who are strong, but only do really super extra strong things at dramatic moments; supers who don't casually swat bad guys and explode them, and otherwise live in a World of Cardboard.
Super ST has a bit of a blip in it, in that it provides an exponential ST bonus for a linear price (which is great) but the first eight levels are actually more cost-inefficient than just buying ST that you can use all the time, without spending FP, and which comes with HP. The value of Costs FP is also a limitation that is a popular target for house rules - which value you use changes where that cross-over point of inefficiency is.
My solution is to charge for the first 8 (or whatever) levels as if you bought Super ST as its components via totally normal pricing schemes - after the breakpoint you switch to the RAW linear costs. This means that no matter how much Super ST a character buys, they are still getting a point break vs regular ST. With that in mind, here are three tables providing these point costs, for three different popular schemes for Cost 1 FP Per Second. I recommend treating Super ST as a hollistic advantage and applying power modifiers, the Size or Growth discount, the Cosmic modifier, and so forth, to the total price - this is somewhat multiplicative, but frankly Super-strong characters in GURPS need all the help they can get. It's also way simpler.
This is for games using a price of -10% for "Costs 1 FP/Second" (the price from Basic Set).
Rev. P. Kitty
This is for groups using Rev. P. Kitty's house rule of "Costs 1 FP per second" for -40%. See link, rule number 5. Make sure to expand it for the full details.
This is for characters using the pricing scheme from Christopher R. Rice's GURPS AEON campaign, where "Costs 1 FP per second" costs -80%.