MVPing? You need a little more DEX. BB offers no bonus hit. You actually need 70 HIT to guarantee BB spamming on certain MvPs (60 + 10 Bless). You may still want a hint of AGI for better spamming of either skill:
BASE STATS
STR 82
AGI 25 <-With a berserk + AGI UP 10, a 1h Sword has exactly 177 ASPD, which is a nice clean number
VIT 90
INT 4 <-Almost no extra SP, but you gain one extra point in SP regen, which will help a mite with spamming under Magnificat...or you can just dump this for another point in AGI for no noticeable anything, or 4 points in LUCK if you prefer...for 1 extra attack!
DEX 54
LUCK 1
However, note that going BB and MVP, unless Godlike or someone else with a level 99 Knight actively MVPing wants to chime in, I would recommend 64 base DEX, or aim for a Mummy card. At least levels are lower than in Renewal, so 60 should be sufficient in most cases with BB.
BB versus Pierce? Pierce outperforms against BB under the following conditions:
1) MVP is large
2) You have 168+ ASPD with Pierce...at this point the spammability of Pierce is about even with a 182 ASPD 2HQuicken BB spammer...assuming of course the enemy is large. At this point Pierce will start to outdo BB little by little as ASPD/AGI go up. However, Pierce will never out-damage BB on medium or small on this server. You can on Medium at 188 ASPD...if you're not lagging and pinging under 100, but this is only due to BB's delay...and technically you'd have to be a 3rd class to make this possible while still dealing damage, so ignore it.
3) BB has no bonus to HIT, Pierce gives an additional 50% more hit rate. So faster MVPs definitely benefit from Pierce given the lack of Spear Dynamo.
However, I should note BB weaponry offers a lot more raw power, base attack, and card slots, and are easier to farm and get to +7/9/10/12. This is true for both 2h Swords ( Claymore [2] ) and 1h Swords ( Flamberge [2] ).
So right now...BB is cheaper to build, cheaper to build well, cheaper to access higher damage weaponry, and cheaper to boost in output. Spear is kind of a pipe dream atm. Essentially, to properly build my beloved Spear Hybrid Knight, I may have to make a pure BB 1h/2h Sword Knight. Nevermind most of the best 2h Spears for Knights (and Saders) aren't even in the game atm because the drop tables are different from old RO (for instance, Brionac used to be a Doppleganger drop, and Hellfire either an Orc Lord or an Eddga drop).