Idarran is great with cards that spawns/create like reinforcements/chapter of wiz/ runeword/forbidden magic
our aim is to spawn as many spellweavers as possible
spellweavers get a charge everytime you play a mage or a spell.
runeword/triss is great when you have deployed all your spellweavers and triss is a mage hence all of them will get a charge, runeword is a spell they gain another charge, runeword creates another mage.. hence another mage hence 1 more charge.
you can change triss with adalia for another extra spellweaver
Keira Metz is great when playing all the unique spells.. also giving 1 charge to each spellweaver for every spell Keira plays
we have 3 unique spell cards. playing keira as the 4th cardfrom the last is optimal
we can spawn using reinforcements
chapter of wizards/ runeword can also spawn spellweaver though it is a rare chance
use 1 onager with siege engines to secure the 1 round
use another onager with Spellweaver to secure another round.