1. Just to clarify: Invis only stacks if you are using NIN sub and Tonko to make yourself invisible. The white magic spell Invisible does NOT stack. If you cast it on yourself while Invisible, all you'll do is knock whatever invis time you had left off.
2. You are visible very briefly when you reapply Tonko. While unlikely, it is possible to get aggro'd by sight only mobs while doing this. Saw this happen to a RNG/NIN looking for his AF coffer in Monastic Caverns. He was quite surprised and none too happy.
i do not know where you got either of these pieces of information, and i am not trying to come across as arrogant, but both of these are wrong. no invisible spell "stacks", what happens is this, whenever you cast any spell or use any ability invisible wears off, so when you are invisible and cast invisible, the first one wears off and the new one takes its place immediately. it works the same for any way to invis yourself including invisible, tonko, prism powders, hide and camoflague. the part about being visible briefly when recasting tonko is only in the animation, but the status icon is there the entire time, making you invisible to mobs.
I was wondering, if you're with a friend in a party, just you two, and your objective is to get their AF.. Could you pick the lock for them and retrieve THEIR AF?
The answer to this is no. Whenever you open a coffer for AF there is a message that says you opened a coffer and inside is a piece of armor that noone else in your party can obtain, so you get it. if you tried this you would get gil, or an item depending on where you are. Any items obtained from chests or coffers while in a party (aside from AF) are placed in the treasure pool. Edited, Wed Apr 13 14:39:45 2005 by Buront