Another method in deciding my Digi-Decks is to map out my Digimon like a tree, it probably sounds really stupid but it seems to help. I lay out my Megas first then the Ultimates they come from, then the Champions and so on in a evolution tree pattern.
Strategy here, probably try to get to Apokarimon first since when he dies he becomes a Mephistomon and after he does that digivolve him to Gulfmon. Also try to keep my Power Option cards handy to power them up when needed.
Renamon was basically a filler since she can also get to Gulfmon.