Updated the guide with slightly detailed notes on a few things, like various abilities and how stats work.

Still don't have any hard damage/stat formulae, and I haven't had a chance to do further testing on crit rate and STR vs. ATK, but for now, valuing STR:ATK at a 2:3 ratio seems sound based on limited parsing, testing, and just looking at the materia boosts.

Someone posted on ffxivpro that Hart Guisarme +3 is 145 base damage, falling in line with the boost from +1 to +2. With that being the case, I feel even more confident in stating that Ifrit's Harpoon is the better choice. My conjecture is that Hart +3 would need at least 3 materia to be on par with Ifrit's Harpoon, not counting the additional effect of fire damage.