first run in nightmare ,need help with Accessory

[darkpic06]

Hello,
i'm actually for my first run at chap3 (beginning), and i wish know what are the best accessorys in game for all the student,and what accessory in must buy in priority ,maybe some of them are missable ?
because i don't want to be block with an futur boss fight
thank and sorry for my english
i love this game

[Stabbey]

Anything which has "part of a set" in the description is missable. You might have missed one or two of them by that point

Anything else can be obtained later. Every boss has their own preferred status effects to inflict on the player, so really, the fastest way to know what to put on is to fight the boss and discover it, then try again. But any accessories you find in the last dungeon of a chapter are a big clue about what status effects the boss is likely to use.

[butterbattle22]

If you're playing smart, you shouldn't have to guess at what status resistance you need for any specific fight to win. Not to say that it doesn't help.

Like Stabbey said, if it says part of a set, it's missable. Other than that, the benefits of each accesory should be fairly obvious. You should begin with equiping accesories that resist more than one type of status. Then, you should spread them out a little bit so that, put together, at least one character resists most types of status. However, you should also prioritize more crippling statuses like faint over less crippling statuses like poison. Most stats aren't very important in comparison.....except speed......and maybe evade, accuracy, and crit.

[darkpic06]

ok thank a lot Stabbey and Butterbattle22 :)
i think i have forgot an part of set" i sad ^^