Thank you for this guide. Although I don't own key creatures of the deck, I have found much food for thought in the post especially because I mostly play HRD.
Right after reading the post, I decided to replace 2 Sneaky Bruisers with 2 Inconspicuous Carriages in my 10$ HRD deck. I did it to reduce the amount of 5-mana creatures and get frontlines.
Coincidence or not, right after that, I had 8 wins and 0 losses in Solar and entered Ethereal Diamond 😀
If someone is interested, the deck code: GU_1_2_CCmCCmCDnCDnCCQIAlIAlCDDCDDIClIClCEPCEPCFMCFMKCZKCZICyIAkIAkKCpKCpCEcCEcCEXCEXCAbKCuPAQKDX
😎
Being stuck with high mana cards is bad since you want to curve out and be as fast as possible. You only want to get 5 drops on 5 so by then you are likely to find it.