Add Skore, a skript scoreboard addon that supports versions 1.8-1.15.
https://forums.skunity.com/resources/skore-the-scoreboard-addon.617/
They are but you probably use “set score†and all that which is the bad way if your going to update it every second or even less than a second. Using skellett barely flickers but the syntax is much harder and it doesn’t explain well in the docs, so your best option for making skellett scoreboards are to look at examples or to get used to them.
(Forgot to explain why skrayfall scoreboards are bad when they update a lot): They flicker a lot, like in FloatPvP I can already tell they use skrayfall scoreboard and they flicker a lot since they are being updated fast, so your only option is to update it every 3-5 seconds or just update them when players receive kills or something.