The main relevance of the spear is that it possesses the power of a tempest within it and people tank that.
Yeah firstly there’s no reason to assume that because it has the power of a tempest within it that it’s seriously outputting city destroying blasts with every attack. Sure it’s got that empowering the spear but power source =|= output. We’ve regularly seen characters get rejected from scaling to their power sources (such as the 2016 Cyberdemon) and it's likely The same here.
The current scaling would also imply the Warriors hit you with the full power of their spears with each individual strike and that barely makes sense at all. Even ignoring that, we’re scaling their physicals purely based off one of their weapons even though that has issues.
We see them regularly tear through each other in the multiplayer stuff, slice through monsters like butter and even slay the Titanic Polyphemus but there’s no Tier 7 feats outside of this. We do see a “Trial of the Gods” segment where we battle Hercules but this feels questionable considering he’s exactly the same design as in 3 (despite this being some 20 years before GOWIII), is in the Forum from that game and also is basically just a reskinned version of his boss fight from that game (and he breaks the Cestus which canonically is busted since he has them decades later).
We also know they have to be weaker than Kratos since the GOW1 Novelisation has Athena claim Ares’ blessing granted Kratos
“near Olympian strength and toughness” (and there’s the very point of Kratos being bred to be a perfect weapon against Olympus) so between that and him so easily besting Pollux and Castor, who can kill the Warriors easily. All of the evidence would imply he’s far greater then what is, essentially a run of the mill Champion for Olympus, so the lack of reliable Tier 7 stuff for Kratos bodes poorly for the Warriors.
We see a similar statement for the Ice of Poseidon
“containing the might of a Typhoon” and this has the same issue but doesn’t seem as bad. We see Kratos create massive ice crystals with his ultimate attack for this which could imply he’s higher with Ice Manipulation (I say higher because there’s no real evidence of a universal power system) and this could apply to the Warriors since
some of their attacks involve this ice.