Didn't even know there was an Elona thread here. On the previous page there was a question about the uses for the final god gifts. Here's me two cents going from the most useful to most useless we have:
Aureate Constricter (Yacatect) - since the minimum transaction value needed to improve Negotiation is (NegotiationLevel+10)^2 it's very hard to improve it past 80 and onward. HOWEVER the NegotiationLevel in the formula DOES count enchantments including negative ones. This item makes it infinitely easier to level negotiation and charisma. Take note the bonus for workshiping Yacatect is counted after this arifacts so you can end up with above 0 effective Negotiation.
Sasumata (Ehekatl) - a weapom that can't kill even the weakest enemies means infinite staff, evasion, greater evasion, eye of mind, stranght, stamina training. Just hold down the button (or use something to do that for you). Theoretically you can get simmilar results by damaging your weapon with acid enough times, but it would take forever.
Fetter of Earth (Opatos) - the speed malus is plain terrible...unless you want to grind AP at high speed. AP grinding requires your speed to be lower than your opponents. Might want to workship Lulwy to have a bit more than 10 speed though.
Magic Canceler (Itzpalt) - helps with leveling offensive spells by both reducing casting propability (it will eventually reach 100% from levels anyway, but...) and decrising the ammount of dice rolls.
Wheel of Fortune (Ehekatl) - Control magic gets more exp when you actually hit your pets, so this can be a speedy way to raise it, but more importantly hitting 10+ pets with strong ball spell trains your Magic at a decent rate. The problem is to make sure not to kill your pets.
Tempest Coller (Lulwy) - mostly useful to train armor skills since they go up faster if you get hit so having 0 evasion and greater evasion speeds that up quite a bit (just don't die).
Mechanical Binder (Mani) - no criticals means more normal hits per enemy means more weapon EXP, though I think it's better to rust some unwanted piece of whatever weapon you're using to -10 or lower.
Green God Thorn (Kumiromi) - slower HP, MP regen means more EXP to regeneration, meditation, but it's easier to level regeneration by carrying too much and droping it near death and casting spells.
I've also recently completed North Tyris questline. Would anyone be interesed in a VERY rough synopsis of the South Tyris story as I go? My Japanese is kinda so-so'ish (especially with the constant use of Old Japanese in this game), but I could give it a try.