How does Torn Signpost work really? How does it interact with other cards?
Torn Signpost post sets your base strength to either 2 (at inferior potence) or 3 (with superior potence). Any bonuses printed on the vampire will add to this base strength. Therefore a vampire with +1 strength (Richter) who plays Torn Signpost at superior will have a strength of 4 before adding in a strike card, or any other card that adds to strength. No matter how many Torn Signposts you play, your base strength will either be 2 or 3, they do not add onto each other. Fists of Death adds to your strength, so if you play 2 at superior, you will have a strength of 5 plus any other cards you may play. If you play Torn Signpost and Fists of Death at superior, you will have a strength of 5 and can add to that with another Fists of Death, a Fire in the Blood, Undead Strength as your strike, or any other strike that increase the amount of damage you do based on your strength.
