Phen is 25% more cast time, Bloody Butterfly 30% more cast time I believe..
not-a-edit: From ratemyserver:
Bloody Butterfly:
"Spell casting can not be interrupted.
Increase Casting Time by 30%.
Inflict 5% more damage with Fire Wall."
Phen:
"Skill casting can not be interrupted.
Increase Casting Time by 25%."
Both of them increase the cast time, sadly. :/ Would be cool if one of them was giving more delay, not cast time.
But blah.

I guess this was off-topic anyway.

Ah, maybe something "
useful" for the OP:
ASPD (means: AGI and some DEX) reduces this after cast delay, I think.