The only class that can reach IC with only 1 dex is crusader/pally i think
2x berz = 30+30 = 60%
DL and DI combo = 20%
Aegis = 18%
Clock Tower Manager mid = 5%
[If used DI valk and CTM mid]
or
[If used DI mid and Kathryne Keyron upper headgear(reduce cast time by 1% per refine lvl)]
Making a total of over 100% cast reducion which makes it instant cast
Not familiar can you please elaborate
2 x Beelzebub Card (accessory)= 60%
Dark Lord Card (shoe) and Dark Illusion Card (headgear) Combo = 20%
Aegis Shield (Crusader/Paladin Super Quest Item) = 18%
Clock Tower Manager Card (headgear)