Consulting the Codex…
RS3 · Skills · Activities · Quests
The Codex keeps its readings for 400 days, so you can go back that far, to the first day it read Rmilkman.
Herblore 72 → 96, 8.8m XP
Prayer 80 → 95, 6.7m XP
Summoning 65 → 96, 9.2m XPWeakest area: Combat stats. Best style is Melee at 89, 90 is the usual bar. Quests need a public profile, so the quest checks are left out of the score.