Valiant Force Forum

I've merged over than 20 heroes and always give genesis heroes.
My guildmates also only got genesis heroes and the only time I saw something different was when someone got darrion BK in FB group.
My Question is :

1. What is the rate of obtainable heroes from hero merge? Is it 99.9% genesis and 0.1% valiant?
2. Is hero merge a total ripoff?

I only saw once in FB, Darrion CK and a Sven berserker.
Usually all genesis heroes, the rate must be damn Low to get other heroes at all.