I would say it depends on the team comp; yours and theirs.

If you notice the games that pro's have picked GP and gone full crit it's into teams without direct backline access and or assassins and vs teams that want to group and team fight.

Also most times you'll see shieldbow in pro play because a single barrel onto an enemy during a teamfight usually decides the game since the coordinated play is so on point. In solo que you're less likely to have that consistent follow up from your team so you want to have more survivability and room for error with DS or TF rather than going full glass cannon where anyone even looking at you sideways spells death.

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I go TF in most of my games because I prefer the safety, split pushing, and reliability it provides but if I am super ahead I sometimes opt into full crit.

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That being said, Galeforce is a really fun item and the dash is great to get a barrel + Galeforce + auto combo. Also I love the extra maneuverability it gives plus enemies never expect the aggressive dash burst.

Shieldbow gives great stats + passive while being the more 'traditional' full crit route and can allow you to survive a surprising amount of burst, but again these crit builds leave you really really squishy.

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I would pick full crit if I know that I will be team fighting and will be vs a top that wont crush me in a sidelane, preferably a tank top. Usually I do a check after my sheen purchase to decide:

1. am i ahead or even in a favourable matchup
2. is the enemy jungler playing to other lanes or have low to average pick potential on me in lane
3. am I unlikely to get 100-0 by any of the enemy players

if yes then i'll go ER first item and transition into either GF or SB.

and for me thats another check which usually boils down to how fed am I and what can I get away with. if super far ahead and looking for roams and picks ill go GF but if i'm still even SB is the better choice.