Well, you asked about levels, so here's my (humble, patrial) answer:
Looking at the time Harry spend with Daniel I'd say
Summon+Conjour about 4-Year (summon doesn't mean accio, more like the troll Quirrel summoned)
Charms+Transfig about 3+1/2 Year
Defense more like 5. to 6. Year (Daniel knows the Prophety)
Divination would be more known from the Clairvoiance aspect then from tea-leaves
Runes+Atrimancy about late 4. to early 5 Year(remember they start 3.Year at Hogwards).
That said, I hope to see more from this story (hobbles off, to seek his old DnD stuff...)