Thanks for the replies, first of all!
Yup, Forgotten Beast, the BSB is indeed lacking and is just too necessary to leave out. Hence, I put up a new list, following below, where I cut some corners to put him in.
Also, I will indeed stick with 2x3 Demigryphs instead of 1x6. It gives me another unit to deploy, another tactical instrument and spreads the threat, as so nicely put by Annum. Also, it still is 9 wounds worth of 1+ AS knights to take down per unit, which means a lot of focused shooting or a lot of attacks to grind them down. 1x6 is more robust, of course, but then again there are a whole load of eggs in that basket and when they flee and are overrun... *shiver* I believe that 2x3 do give me more choices. Also, they do, all in all, give me way more attacks.
I have been considering lores and taking the comped environment into account, the lore of heavens somehow seems hell attractive. I can only cast spells at a max of 4 PD in the comp., but my opponents can dispel as usual. The comet is one spell that is likely dispelled, and it only comes at a casting value of 12+. That's neatly cheap, and apart from that, I get high-strength support and might just get to re-roll all my 1s, which is a major boost taking knights into account, which my army is heavy on. Besides that, the signature spell sure is nice.
This is my new list. Notable changes (apart from a BSB I cut some corners for) is that now, my grand master is my general! Because my halberdiers and detachs are Ld9 ANYWAY thanks to the general of the empire in there, and my knights are likely going out of the bubble of that infantry man too soon. Same goes for the bsb.
TGM, shield, runefang, the other trickster's shard (general)
General of the Empire, fpa, shield
Wizard lord of Heavens lvl 4, dispel scroll
Warrior Priest, great weapon, heavy armour, barded warhorse
Warrior Priest, heavy armour, shield
Captain (BSB), lance, fpa, shield, barded warhorse
37 Halberdiers, full command
+ 15 Swordsmen detachment
+ 5 Archers detachment
392 Pts. total
9 Inner circle knightly orders with lances, full command, Standard of Steel
3 Demigryphs, musician
3 Demigryphs, full command, banner of the eternal flame
1 Great cannon
Total: 2499 Pts.
What do you think? I mainly cut corners on the ridden warrior priest, the demigryph champ, the halbs and their detachment of swordsmen. Looking better?