[Dynamics]

I find your reasoning with both the strength vs spirit build and dexterity vs endurance build debate a little lopsided. You're not taking into account the significance of the numbers properly. The damage acquired from strength really isn't that useful, and it shows more and more as you venture into the higher levels. Strength is replaceable, but criticals are a slightly more elusive stat to gain. There are five sources to get critical from (scrolls, potions, earrings,weapons, stats) but about seven for strength (potions, body armors, boots, leggings, weapons, boots and stats). Taking into account the numbers, it's possible to get 16-17% critical by level 50 if you use a pure spirit build. That's one in five attacks that are going to be criticals. If you land one critical in a battle, it more than covers the damage you would've gotten from the damage gained through strength. If you waste points into strength using your suggested builds the figure for criticals will waver by ~2.5- 5%. Not a very nice loss.

Dexterity is unreliable compared to endurance. No one really knows the figures, so we can't say it'll really save you that much more in terms of money and HP. I'd also like to add that power scrolls > dexterity. Although personally I find both stats fairly unnecessary on an archer, as we get adequate amounts of both stats from levelling alone.