Partying to grind CAN be faster, if conditions are met. Obviously your party members must be grinding cabal2 alz hard with you, no slacking off or such, which decreases damage, which decreases kills, and therefore decreases EXP gained for you.The map and/or spawn area should also be relatively small and have a high spawn rate, to the point you can't kill all the monsters as fast as they spawn while soloing.You also want to have the minimal amount of members to be able to clear and grind the map. Reason being is the EXP division.If you and another person can clear the map at a good pace, with monsters spawning to take place of one you killed immediately after, this is good, your EXP gain is 1/2 and you're killing more than twice the amount of monsters, negating the 1/2 EXP gain. If you have 4 people, your EXP will be cut to 1/4. To put it simple:You gain 100 exp per monster kill on this 1 map. You party with another person. You now gain 50 exp per monster kill. 2 monsters spawn every 10 seconds. You and that other person kill both in 10 seconds. You gain roughly 100 exp per 10 seconds.