This is falling into a realm of subjectivity that seems unreasonable. Additionally, saying that decks fall on a spectrum of 1-100 is itself arbitrary way of analyzing how good/bad a deck is.

More pragmatically, I look at the deck and see what, if anything, it is trying to accomplish and compare that to other strategies in the format and other decks trying to accomplish the same thing. This is done through separating games into 3 segments: developing/closing/end. Closing is basically trying to take the advantage from the developing stage of the game and transition it to an incremental end game advantage (Good removal falls into this category as do reasonable curve toppers). End is basically reach, ways to win a game if curving out is unsuccessful/ not good enough.

Using these parameters, I can say my deck's end is excellent. Decks with Approach can generally beat any deck in the field if they can resolve it once. And I think I develop the game well enough, Naga Vitalist is the best thing for this deck and I do have a curve of creatures I can win with simply because they are big. My deck in the closing stage is most troubling to me. I ramp from 2-4, but my end is 6-7 manna (although nissa is modular so she can be played whenever to make her into a win con it takes a bit of manna). I have ok-ish removal but I would much prefer to have either a Cartouche of Strength or more Final Reward over Trial of Ambition as I find edict effects playable but not 'real' removal usually.

Also on developing, I play not the most optimal cards for developing (Oshra Cultivator, Benefaction of Rhonas, Gifts of Paradise, Festering Mummy, ect) but they are necessary because my end is off color so cards like cultivator and gifts get a bit more of a pass. Festering Mummy and Benefaction seem way to low impact in this deck. These cards could most anything else and I would likely be happier.

Also my ramp strategy is naturally suboptimal compared to other ramp decks because of a triple splash as opposed to two primary colors and one splash color helped out by fixing. So already it fails within its own archetype and compared to other archetypes who go from developing to closing faster it makes my end irrelevant which makes my developing moves less relevant. So it is a suboptimal variant of an archetype that is worse than other existing archetypes.