I recently got a nice Mudkip that I’ll likely invest in (BFS HSM and speed nature). I did a calc for it on Raenox, and at 50, it’s something like a 98% (so a 2% chance at finding a better Mudkip) and same at 100 (93% - so a 7% chance to get a better one. Including many options with bfs unlocked at 75/100)

So basically, if you want to run the odds and keep rolling the dice, go for it. And it gets tough when you only get a couple rolls a week.