Gillette Slim
I stand by this and would add both of my Edwin Jagger DE89's, both of which are amazingly smooth yet efficient.Rockwell 6C, R4 plate: efficient and easy with a sharp blade.
Interesting, I liked to dial that one up with a Feather Super. I plan to get a Blackland Vector, supposedly more aggressive, so maybe not your thing, but just want to mention with which razor in mind the Romulus was made.Yaqi Romulus (with a better handle, the additional grip is important). Aggression can be controlled by blade choice. Kai Titan Pinks are my baseline for Easy and Efficient.
I don't have a Fatboy, but I know the Derby Premium, the black ones, right? I found that blade downright weird, it was too dull but liked to bite! But then, razor blade experiences are often so totally upside down when others report about them, over the years I got used to it!Alas, like a perfectly pitched game, I have not since recreated that experience.
It does become a different beast with a Super. I tried using it Easy and autopilot with a Super, but I had to reconsider once it almost got me a few times. This was with the slippery and round stock handle. I might need to retest with my better handle upgrade.Interesting, I liked to dial that one up with a Feather Super. I plan to get a Blackland Vector, supposedly more aggressive, so maybe not your thing, but just want to mention with which razor in mind the Romulus was made.