Flame Totem is REALLY boring though, imo. You can do just fine with one of the many other builds that require no gear, a few of which can be MF builds too if you want.
Casters:
Mostly Incinerate builds, bunch of variations there with block/multi layer defenses/cybil's paw and such, generally super tanky builds to make up for having to stand still but still do crazy damage due to incinerate being very strong. Can MF.
Explosive Arrow(it's obviously a bow attack, but it behaves pretty much like a spell), very strong build but needs an early Quill Rain which can be annoying to get. Can MF.
Melees:
Cyclone builds, tons of variation there, 2H mostly, very tanky due to always being moving and tends to be very health/str centric
Reave builds, tend to be 1H+shield or fake DW(you equip a non reave supported weapon in your offhand this way you get DW benefits but only need one weapon the other being an offensive stat stick), crazy scaling lategame but can be hard to level without a decent weapon(if you go daggers though you can use a bunch of very strong phys unique daggers)
Archer:
- Poison Arrow, arguably is close to caster also, basically you just poop poison clouds everywhere, relies on getting a +2bow asap and shit so can be annoying to gear, but only for high end shit, it's very easy to gear until you reach the endgame maps/atziri and such, can MF easily I think
- Tornado shot with double heralds is also still viable and pretty easy to gear early on
Summoner/Totem:
- Traditional Spectre summoner, very strong, very easy to gear(do need a few summoner uniques to maximize efficiency, but not needed until later on). Can easily be MF built, but you have to go grab your good spectres everytime you relog so it's a pain in the dick to play sometimes. Also has an animate weapon variant.
- SRS variations, some of which include spectres+zombies, only zombies or no other pets at all, very strong, very easy to gear, can do MF, can focus a lot on defensive shit in the tree, only downside is you need a good way to deal with the high mana costs(EB+ZO and ES, Blood Magic Vagan mod or just a high mana pool preferably with Pledge of Hands). There's a mines variation but you need the mines unique staff for it(which tends to be cheap but meh)
- Dual Flame or Incinerate totems, see guide posted above or the incinerate one, very easy to gear, very easy to play, can MF very easily, but boring as shit imo
There's probably a trap/mine build that's good somewhere too, but I haven't really heard of it. There's been a bunch of improvements to the gameplay though, notable being able to spelltotem+detonate mines so you can just drop mines and have them detonated instantly over and over.