How to gain 140m exp in 4 hours

Isn't it 172? When I did the calculations for my Viper, the accuracy calculator said 172 accuracy at level 14x to hit them 100%.

Guess it is then. I just knew it was somewhere between 169-175, and I never dip below 175. Either way, before my overall leveled, I was in danger of falling below the required acc to 100% hit, which, let me tell you bub, ain't gonna happen (as well as losing large amounts of my attack power and HP/MP). I now have 194 acc without a maple weapon, so I could theoretically switch, but am reluctant to do so because damage makes a huge difference in how fast I can kill there. Equipping a statless pendant for 2 hours to get the buff I need from it either wastes 2 hours or results in 2 hours of slower training for however long of slightly faster training. Not worth it for me, considering swapping my MoN means the difference between 5 hitting and 6 hitting. 4hitting/5 hitting when you factor in Rush.