I strongly disagree with this. Spellsword (in particular) and Archmage do just fine. My first good run on NG++ was a Spellsword.
I LOVE Spellsword! Chakram is the best, but axe and scythe can be pretty deadly too.
Spellsword seems to be by far the highest DPS class and it's main attack is ranged to boot! I absolutely decimated all the bosses with this class from NG+ to NG+5 where I quit playing since all the skills were maxed.
I had a lot of fun with this game. I got a solid 20 hours out of it which, while it isn't a huge quantity of time, was a good quality time.
My wishlist for a RL2 would be:
-Harder boss battles (I honestly found some of the rooms of regular enemies much more challenging than any of the bosses)
-More variety in areas/enemies
-More to accomplish. Perhaps more skills to unlock, more armor, more achievements, or anything else at all
-Other modes, i.e. a speedrun mode where you could maybe choose your desired class and pick from level 1, level 100, level 200, and max level skills and then choose your NG cycle and just try to beat the whole castle in one go as fast as you can.
Considering the history of the developer that was included in the game, this was definitely quite a solid game to come from such a small team.
Although I wouldn't want to force the developers to work on projects they're not passionate about, I really do hope they get enough sales to make a RL2. It seems like with the base game engine and systems in place it wouldn't be too hard to create art for new areas/equipment, or create new genes/classes/etc.
At the very least I hope they create a little expansion pack with maybe a few more skills and a new area/boss with a few new pieces of armor or a new class/etc. I don't usually buy DLC but I definitely would for this game