No. If you do this it will allow for 6 Bloodspillers under Delirium and 6 GCD's under Blood Weapon, which will be a decent and unnecessary DPS buff. The only reason that Requiescat is the length that it is is due to the fact that the PLD casts spells while Req is active, and spells do not benefit from Skill Speed. This means that his GCD on those 5 casts is exactly 2.50. Req's buff lasts for the length of time it does in order to guarantee that, with proper weave timing on the activation, PLD can get all 5 GCD's under Req's buff.