Bloodeyes you're seriously overestimating the cost of levels. Take the 40 VIG, 30 END you mentionned. Those are stats strong enough to tackle the end game, yet they only require you to reach sl51 with the Hero starting class. You could reasonably expect to reach that by the end of Stormveil Castle if you were thorough with your exploration of Limgrave and Weeping Peninsula, by which point you could potentially still have 100 levels to spread around to your hearts content. Hell, you could still bump VIG to 60 and still have 80 levels left over.
Another thing, about colossal weapons.
You are seriously discounting the impact of weapon movesets and the impact they have on the flow of combat. If you take the colossal weapons, they are slooooow as hell, don't do
that much more damage than other builds (especially not in terms of DPS) when optimised properly and weight a ton, forcing you to invest in a lot of END if you want to be able to wear armour and god forbid, a shield too. BUT, they give you a degree of control over encounters that no other weapon can. I joke a lot about simply Bonking! enemies to death, but in fact it requires a very good sense of timing and careful reading of the enemies moves to pull off. If you do it right, then the result is that you completey stunlock the vast majority of mobs, utterly negating their moveset. If you don't, then you'll feel like you're just scrambling around unable to pull off any attacks, especially in the early game where you don't have any armour due to said weight requirement. You will also stagger most bosses extremely quickly (IF and only if you can keep a good pressure), something that practically never happened in my jumping jack faith build. At the point I am at in the game with the strength build (closing in on Malenia), I am doing less damage per second than the FAI build, but I can control the flow of a fight much better, have far better DR (heavier armour and no need for scorpion talismans), BUT I also have less tools available than the FAI build who could switch between ranged and melee combat, AOE or single target damage...
Another point too: my main weapon is The Greatsword (yes it's a colossal, don't ask why, it's an anime reference apparently), because it has really good damage and I'm really comfortable with its moveset, meaning I can time my attacks with it really well. But I also semi-frequently use other colossals: the Zweihander because it's lighter (I can use it with a shield) and because its R2 is a piercing thrust (which is crucial against dragons who are resistant to all but piercing damage) BUT it does less damage than the Greatsword. I also use the Prelate's Inferno Crozier if I need Strike damage (against the Crystalians for example), it does MORE damage than The Greatsword BUT it's slower and heavier. I also have the Great Mace with Sacred Blade on it to deal with undead enemies in a heartbeat. AND finally I have the Troll's Hammer for its Strike and Fire damage because there's a particular late game boss that's vulnerable to both (ok, little bit of metagaming on my part here) and it's great for those vulnerable to fire like the Erdtree avatars in the meantime.
This is of course late game, but by the time you reach Leyndell it's not hard to have one maxed out weapon and another on trailing just behind, after that it's trivial to have several upgraded to around +16 with two others at +20 (and Somber weapon can suck my dick because there seems to be none that just scales with STR
).
Are they all upgraded to the max? Of course not. Are they S tier, B tier, F tier? Fuck if I know, point is they're all weapons that I use for specific circumstances in which they excel and that's not down solely to "which one has the best AR on paper".
The point everyone has been trying to make, is that if you optimize your build even a little bit (stats are just one part of it, talisman and flask make an enormous difference too) AND you're comfortable with it (sure, you could do that fancy trick that let's you insta-cast spells, but fuck that) any build can feel overpowered in the right circumstances. I could give you my STR build to play with and you'd probably suck at it and find it terrible, conversely I could play your FAI build and have a horrible time with it. A bleed build in the hands of a passive player who prefers a slow and steady approach will suck for him, yet it's widely regarded as one of the strongest possible. A build is only as good as you are playing it.
Play a game with stats without a build? Unthinkable! I'd take at least a 60% decrease to my enjoyment by dropping the planned builds and not agonizing over every stat point spent! I actually wish there was a level cap so I'd have even more scarcity to deal with.
Spoken like a true munchkin gentleman.