A single mistake? Sure. But one thing i learned playing WOTR is that you might think you are making the right choice, but you can't actually finish the game with your build.
Oh please I finished WotR with several unoptimized and "badly" build characters, including one which was build from level 1 for combat in gold dragon form (already a suboptimal choice) instead of using respec, meaning for 3/4 of the game all of his feats were useless. On normal difficulty.
I played on core. Was having a good time with the party i had. Then i reach the cancer threshold and get demolished first fight there. No matter how much i micro, the spells i use, the buffs i cast. Toyboxed a respec and rebuild the entire party with builds from the internet. Boom easy.
