User blog comment:Hitsuji Mamoru/FGO-style Servant Creation Room/@comment-4802891-20170129055322/@comment-28209103-20170129100619

it is bonafide question cuz maybe you have original mechanic or something or simply wrote it wrongly and you're thinking of something else, but if it exactly as it's written then it's a critique of short.

i'm lazy at math but my initial estimation for example a party with servant with 10 20 30 star weight if you give them star weight up at x10 you'll get 100 : 200 : 300 with star focused on 300. in the end the star gonna go to those who are more likely to get the star in the first place, thus single target star weight up function exactly the same only more effective. on the other hand if you're running party with similar star weight there won't be any differences thus making it pointless.

just so you know star weight isn't the only mechanic of star distribution.. under the hood observation reveal that the game assign random multiplier to each servant per turn, those number are 50 30 and 20, formula thanks to Master Kyte of beast lair

for example if servant A have 100 star weight and assigned 50 mult = 5000, servant B have 150 star weight but assigned 20  multiplier = 3000 and servant C have 200 star weight and assigned 20 mult = 4000 then the star distribution will be    A > C > B even though C is the one with highest star weight.

case by case calculation will be annoying but you get the gist of it. think of this^ as references when you're going for star dist up in the future.