Big Cat's Blessing gives +46 DEF and +1000 HP
I haven't experimented much CRIT build. Most of the SinX
I've seen though is CRIT, not much dagger types left.
BTW, you can also add that Ignore -10% physical def offhand you can
craft at Izlude (looks like a diamond ring) to your dagger gear build.
IMO, Crit might have higher DPS vs Dagger because:
1.) Size penalty - Dagger does 100% dmg for small, 75% medium and 50% for large (If its the same with main series RO, which I think it might be), Katar has 75% for small, 100% medium, 75% for large
2.) There is no passive atk enhancer for daggers, unlike Katar. Only the new armor break skill and of course the double atk feature. Crit tends to be consistent.
3.) Even though craftable daggers in Morroc & Payon seem to have high base atk, they are negated by Size penalty if you are primarily targeting Medium and Large Mobs.
Overall, as of now anyway, Katar/Crit build would be the logical way to go. Morroc katar would be the ideal starting point if you plan on this build. I'm actually leaning towards it too. Imma reset skills and stats and have weapons and gears ready.