@Ataraxia_xp you are lucky with one time.
I tried to challenge Khiona and failed. I summoned 28x in the row and failed. I even dint get any standard 5* star hero. Only 4* a few times and the 3* heroes. I felt like I got knocked out that day. This month I tried roughly 15x to get Zim and failed again. This is also the reason why I deleted my bank account once and for all. Not going to gamble anymore.
I reach top 100 with a team that includes two 4* heroes and three 5* heroes that are at 4-60 or below. Im sure a fully leveled 5* team from TC20 could do it.
As far as defense or staying in the top 100…I don’t see the obsession. You get nothing for it other than a harder time filling that next chest. Im more than OK with being knocked back down to 2300-2400 cups.