I want to do it anyways because I dont plan on playing ranked any time soon.

A rune page that wouldn't be absolutely awful for all roles, because I like to mix it up and dont want to spend all that ip on runes, rather than champs.

Armor seals and MR/lvl glyphs are universal. AD marks and quints are fairly universal as well.

some of the most cost efficient ones are ad reds ad quints armor seals and mres blues. A pretty standard set would be apen red, ad marks, armor seals, mres blues and then mpen reds, ap quints/mpen, armor seals, mres blues.

You'll be dropping MPen/APen if you want a universal page which... really hurts your damage dealers. I could see going two pages, one with AD/APen, the other with MPen, but ignoring those are... silly.