Heyo
The number of stars doesn.t change the rate of talismans drop. The number of stars just points u how many talismans can drop from 1 box(u know that boxes u crack to get talismans). 1* will drop just 1 talisman once in a box, 2* would drop 2 talismans, and so on, but i alao could not drop anything :p. Also the * points how hard it is to complete.
My advice is to do 3* fgw, if u dont have a 14dg weapon yet. Make more chars and move ur items from one to another so u can do the fgw on that chars too, if u have time. As u know, the cooldown is about 5 hours.
Don.t kill the sereness. It just takes a lot of time because of te petrify, and it has a lower % of droping talismans than a box. If u still want to do it, call a friend who doesnt do fgw(cuz he probably doesnt need) and ask him for help with the sereness. 10-15 mins
Dont say sorry for asking things.
Keep tryig. Good things come to those who wait