Originally Posted by
Spartacus
Darius carried me on the early game the same way people feel toward Kojiro. Its help that he is my very first Servant. Never Grailed him tho, but he is my go-to 3 star when there is an event that restricts you to use the same Servant again and again.
Other than him, there is Waver. I know he is this super ultra OP unit, but I have him from early on before he got his NP charge buff and defense down, and I spent around 6 months with him only until I got another 5 star (technically, I rolled a second 5 star, which is his dupe).