I made the mistake of purchasing gems to get some heros because the help says you have a better chance of a higher hero this way. Used the 450 gem hero hire and got three of the same hero. It's supposed to be random but please run a standard deviation on that result and tell me it isn't a bug. I want my money back.
It is supposed to be a completely random draw, there are worse things you could get than 3 assassins but I understand the frustration. Don't give up because of that though, it doesn't mean anything except that you had a bad roll. The luck system is annoying because we can get awful stuff, some people have spent more than 100,000 gems going for a single hero before without getting it (probably costing $700+) I spent like $27 and was fortunate to get one legendary out of it
I spent $40 and i too got many bad hands like that..
but.. in saying that... Consuming a hero with the same type of hero gives double points.
Some of my heros are 3/7 now with there first talent thingy.. It's really strong.
It really is random though, my mate got 2 druids and some blue with his 450 spin the other day, LOL!