Phoenix Knight Sacrifice + cost or + power?

[exelol]

What is better to enchant on Phoenix Knight sacrifice ability, "+cost" to reduce the HP cost or "+power" for olympiad?And what DYE's should I use for olympiad too? Thanks in advance.

[Valve]

chronicle?

[exelol]

chronicle?

High Five

[twinkie]

power

[exelol]

Thanks very much!

[Smok3BoY]

if you use it at oly its better for power

cuz in oly you may not have the chance to use it again