So in my WO3 journey I feel like I'm enjoying using Guan Yu the most. I don't even have any attachment to Shu, he's just a complete freight train with a cool weapon type and a simple but effective musou attack. It just lets you delete waves entirely and their officers. Helps he has now yielded me my first five star weapon. Having tonnes of fun but I'm almost spoiled for choice with characters, I guess I can keep playing more. I just get concerned about the cost of buying their weapons and putting growth points in them.

My Guan Yu and Ryu Hayabusa team very comfortably deals with Hard Mode even without promotions.