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 Bubbly Basin.
Herblore 1 → 96, 9.7m XP
Prayer 52 → 95, 8.6m XP
Summoning 78 → 96, 7.9m XPWeakest area: Combat stats. Best style is Magic at 27, 90 is the usual bar. Quests need a public profile, so the quest checks are left out of the score.