Red BL 7/7/24 or 40/7

i have an question that's which weapon better for BL Red BL 7/7/24 or 40/7?
if build for 7/7/24 red BL(+ 20dame 7amp BL)
my set item: set PF craft FC 8amp + 2 bof7 + pain 6 + EOF8 + cr2x2, rol2, Killian + 7/7/24 s.titan helm + kred
Pet 4amp + max rune amp => 81amp, 55rate, 130 dame
If build for 40/7 red BL(+ Red BL 40dame)
my set item: set PF craft FC 8amp + 2 bof7 + pain 6 + EOF8 + cr2x2, rol2, Killian + 15/24 s.titan hem + kred
pet 3mcr + max rune mcr => 52amp, 62 rate, 157 dame
so which is better for BL ?
can any pro BL answer me?

I'm not pro.

Go for Amp/Rate/Dmg on the highest grade weapon you can, so Mithril/SIG/ROSM. CDI is more or less pointless without Amp, so getting both is likely better I think.

Remember that Amp is anti-high defense, while CD is rapid spikes. However with CD you need to have a naturally higher CR (in terms of war). Note: The highest Def for bosses is only around 3k, while in war all def is x2, making players on an avg base have 3k+. So you go do the math which is a better balanced build. GL!

You obviously should get both. At least that's how I roll.