I have some questions in regards to character tanking.
a) How much VIT/STR does Barret get per stack with his innate ability? Also, is there a way for Aerith to block magic damage for other party members? Trying to get mileage out of her Geo-stance.
b) Which characters are best suited for evasion tanking? And I know DEX and LCK play a role in evasion, but is one more important than the other? Also, does LCK increase both physical and magical evasion?
It's +5 for Strength and +5 for the Vit/Spr stacks, 5 stacks of either for +25 max. Aeris can't block magical damage for the other party members, but she can block physical attacks that have an elemental alignment using Cover.
Luck and Dex are checked for separately so it can be difficult to say which is more important; both only influence Physical attacks. Luck is handy for physical attackers as a Lucky Hit check of Luck/4 will result in an undodgeable critical hit that cancels any other evasion checks. They can also dodge incoming physical hits with the same chance, Luck/4.
Dex corresponds to evasion, accuracy, and turn speed. It combos well with armour that gives a high evasion% and can let you run the rule over enemies if you have a few high dex characters in the party (but not on Active ATB).
The best characters suited for Luck-based evasion tanking are Cait Sith and Cid as they have very high natural Luck stats. The characters best suited for Dex evasion are Tifa and Yuffie for the same reason, only for the Dex stat.
If you want both stats high, Aeris has reasonable Dex and Luck stats that could be built up a bit faster than the other characters. But it might be better to push Cid or Cait down a Dex-based route to take advantage of their naturally high Luck stats.
Are the Leviathan Scales obtainable after the Junon Reactor? I assume that they were moved because of all the quality of life things and new content. If they were moved I kinda wanna find them myself but if not, well guess I just don't get Yuffies Limit break. Ah well.
Seems they are missable, though I'd assumed the chest was visible from the submarine exterior. I need to make a patch for saving before the motorbike minigame so what I could do is set up a new treasure chest on the Gelnika that allows for the scales to be grabbed if they weren't picked up in the sub pen.