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 Lonecove.
Herblore 94 → 96, 1.3m XP
Prayer 92 → 95, 2.0m XP
Summoning 68 → 96, 9.1m XPWeakest area: Potions. Herblore 94 → 96, 1.3m XP. Quests need a public profile, so the quest checks are left out of the score.