Please, be as brutal as possible, i want to know if there's anything he can be doing better.
Thanks for the help! i look forward to reading peoples thoughts on him.
Well, I am just going to reply here in the meantime while waiting for a mod to merge this into the proper thread.
Let us first start with pre-raid preparation(i.e. gems reforges enchants glyphs and talent choices).
For 10 man raiding, 7170 haste is taken to be better, still, running a lower haste breakpoint is perfectly viable depending on personal playstyle, which brings me to my point - he isn't even running the 3506 breakpoint, he is hovering at 1964 haste.
Next - he is running Glyph of Illumination, which is a VERY big mana regen loss especially at 17k spirit. Why he runs it just boggles the mind.
Now, for the actual raiding performance.
I will just screen the fight here which I feel best describes the level of his play.
35 Holy Shocks cast out of an optimal 60 casts
Holy Radiance usage very, very low.
Divine Plea and Arcane Torrent only used once, severely limiting his mana regen and ability to cast expensive spells like Holy Radiance.
Holy Power generation in general was terribly low for a 6 minute fight. In roughly the same amount of time, I have 116 Holy Power generated from Radiance and Flash of Light/Divine Light, as well as 74 Holy Shocks cast - link here for comparison: