This is absolutely ridiculous. Another buff for the people who spend 24/7 on this while the rest of us are left in the dust. Everything you devs have done recently are for players who have reached perfection. You couldn't even get making a weaker eb right, you tell us its tier 4 and its a tier 6 eb. You need to balance the game devs because its getting boring for weaker players. If you don't, well enjoy losing money.
You want weaker eb's? There's enough weak eb's, tiered with your growth. There is no point in making more, the ones that's there are perfect for growth, keep moving up to Haunting.
Replace gold with mithril to build T5. At least 100 mithril per land. Need 50k successful assassinate or 90k wins to unlock T5 or full T4 HLBC.