ToME: the Tales of Maj'Eyal

I feel like writing a guide; however, I have no idea what class I should write one for, and I don't particularly want to write something no one is interested in anyway.
Hence, the question: what class are you (particularly new players) interested in, or far what class do you (particularly old players) think a guide would be a good idea?

I don't think I've seen many guides about traps-focused rogues and/or slingers. Yet they're fun (although a bit challenging) to play.

Slinger as in Archer/Slinger? Or as in Rogue with a sling?

As in Archer/Slinger. I wrote "slinger" because, even though bow users can use traps too, the synergy isn't quite the same. Traps and slings require Cun, Trap Mastery's counter-detection & disarm scales off Cun, you can knock targets back into your traps with Inertial Shot, etc.

I never really liked traps. They are fun, but somewhat underwhelming - there are just so many better ways to spend your skill points for both rogues and archers, making traps more of a gimmick, really. Not to say they are useless - they aren't - just that they seem subpar beyond midgame (here we go again ).
Edit: They do seem to fit in somewhat more naturally with slingers, though.
Edit 2: Trap damage also scales with Cunning, even though it's not in the tooltip.

Well, traps are indeed underwhelming, and there are better ways to spend your points from a powergaming perspective if you just want to play the class (rogue or slinger), I agree 100% on that. But the tree is there, and it's no less legitimate to tell yourself "I want to play with traps" than "I want to play a rogue or a slinger", is it? If you build around the trapping tree rather than just "with" it, it isn't a gimmick anymore.

Of course, that was just an idea for a guide that hasn't been done yet (afaik). If you want to write about something else, that's fine.

I wholeheartedly agree - it is well worth playing something for the fun of it. Is it worth writing a guide for? Maybe.
However, in case of the rogue, I need to force myself to use traps in most situations, because other ways of handling them are faster/more effective/less clumsy, and thus ultimately more fun.
On a slinger, traps feel far more natural. Anyway, I think I'll just start by upgrading the (way outdated, both by content and by player skill) slinger guide I wrote 2 years ago (and totally forgot about). Thanks

Any other suggestions are still welcome, though.

As a newcomer, I'd be interested in seeing a new Wyrmic guide. I understand they used to be quite weak by endgame because of low damage, but that when one of the Wyrmic balance mods was rolled into the base game they became stronger. It would be nice to see the before-and-after laid out by someone who has experience with both (if indeed you do, that is). Especially since there's a fair amount of room for different builds within the class.

I'd personally like to see a guide for either Demonologist or Doomed

As far as Doomed are concerned, this should provide a very good starting point.
I'll go for a Demonologist after I finish the Slinger, though, I think. Unless someone beats me to it.

If you are unsure what guide you should write and are looking to create a guide to help new players with, you should first probably spell out what types of character types and builds you enjoy playing. That will likely help you out in narrowing down a list of guides people can ask you to write.

Good point...

I have won with Cursed, Doomed, Marauder, Bulwark, Doombringer, Archer, Anorithil, Sun Paladin and Reaver so far, I think.
I enjoy playing any class, particularly if it can be based on procs or wield mindstars.

Of those you listed, the Archer is available immediately to New Players from the getgo in the base game. The Doombringer is available from the DLC. Cursed are fairly quickly unlocked so New Players can likely get decent access to them fairly early - Bulwarks to some extent as well.

The class with which you personally beat Insane or Madness

I have never beaten either with any class, nor tried to. Which shouldn't matter, really, as I am writing for normal, not for insane or nightmare.