That's actually fantastic compared to someone like me for example. I didn't know rerolling was a thing (never played a gacha before), so I just went with whatever popped (no 5* at all), and on top of that I linked it to my Nintendo account so I can't even reroll again (not that I want). To date, I only have 2 5* units, Ephraim and Hawkeye, and I've probably used my pulls with low efficiency (like always using 20 orbs even if I just wanted green units, for example).
Bottom line is, it doesn't matter at all, it's a game about collecting FE characters so screw min-maxing. It's fun enough for 30 minutes per day.
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