What are some of the worst mistakes you've made?
I'll start off. We all do things as newbs that we look back on with regret.... and some things we do out of sheer ignorance, regardless of experience.....
My biggest regret falls under the latter. I had a decent Clan Boss team for where I was. I had Kael (maxed skills) pumping a lot poison, Marksman doing just ok poison (and Turn Meter boosts), Eviscerator doing ok poison (with a venom set too.... I know, I know), Sinesha for heals/attack and High Khatun for speed. I was doing ok damage for where I was at.
I open a shard and got Karam. A quick check of his skills, the only thing that sounded special was his ability that insta-pops all Poisons.... but at the time I wasn't struggling with poison damage.... I was able to survive long enough to run out all the poison timers. I didn't think it was a big deal.... so I used him food!!! Aaaaahh! I had only seen him a handful of times in the Arena, and my Arena team(s) were already pretty set, so I figured I would never use him.
I later opened up a Bulwark (rare Void Dwarf that does HP burn and can extend debuffs) which really helped up my CB damage.... it was about this time that the whole "you can hold 10 debuffs at a time" thing became painfully aware to me.
Now I just recently opened up an Occult Brawler last week.... now I severely regret getting rid of him. I would gladly give up both my Monthly shards (Sacred & Void) to get him back!