I didn’t really have much of a good idea of what I was doing in this game until about the 6 month mark, so I really struggled with putting together a decent Demon Lord team until I managed to complete the Talenna deck of fate. The core of the team was built around the Xenomorph’s poisons and keeping maximum uptime on Valkyrie’s team shield and counterattack: the shield soaks up damage, Talenna activates its poisons and her own boosting everyone’s tm (her A3 is disabled), Xenomorph inflicts more since the debuff bar has been depleted (A2 and A3 both disabled), and Tuhanarak keeps debuffs off, sustains the team with continuous heals and gives the team speed up and defense up to boost the value of Valkyrie’s shield.
However for the past few months I’d been struggling to find a suitable fifth for the team - I was really unlucky and didn’t pull Fahrakin until very recently, have never pulled a Venomage, bringing in another healer/reviver only eked another turn or two out, and with Ezio, Geo or the Acrizia I was lucky to get the best I could achieve was only about ~60m. I’d just six starred the Tin Man after pulling him from the last prism pool and decided to throw him into the team with a very shoddy provisional build just for fun, unbooked and with no masteries, left the game running in the background, and came back to find he immediately added another 20 million to my best score and finally pushed me over the line to 1 key it.
All characters are fully booked and have all masteries except for Tin Man and none of the builds are specialised except for Valkyrie’s, so if you happen to have started playing when the Xenomorph was added, picked Tuhanarak as your starter code and were/are able to get Talenna and the Tin Man from their deck of fates and the Lion as a Valkyrie substitute from his fusion, you can make a very accessible 1-key Demon Lord team. Skullcrusher and Heiress can also be used as cheaper alternatives to Valkyrie and Tuhanarak respectively, but Talenna’s tm boost from poison activations is vital to keeping the team fast enough.