Yo!
I take Overheal to have a little more survival, as it is true that you onenshot any ADK or mage.But at the moment when 4 Champions turn on you, and you don't have 5stack W, you want to survive as long as possible, while having a reserve of E. So shield will help you, Like, I feel that the enemy needs more time to kill you.
I don't feel any benefit from the Trinity Force except getting a passive faster, in addition its passive effect gives 5% attack speed for each legendary item, we don't need it, its useful for Panth, with BoTRK that good,buuut, you need a long fight for Trinity Force buff.
Strikebreaker works well against mobile ranged Champions (vayne, Quinn, Kallista), but it's not useful in mid-game, for me that's for sure.
While,Goredrinker , gives you an unreliable survival rate in teamfights, I really played a lot of games with this item, and every time I use it, I feel something that I never felt when playing for Pantheon(2100 games), I feel invulnerability, especially when standing in an environment on low HP, during E you sharply heal at 1200+ HP, and this is just incredible(of course, if the opponents did not buy heal cut, but no one expects a heal from Pantheon, so...). described the fact that you get a ability haste for each legendary item, and you return to the fight within 6 seconds.