Let's look at the panel data first. I have trained each profession to level 50, and my equipment is uniformly purple. The test map is Chapter 8 “Fierce Battle at Hulao Pass” in normal difficulty. Among the front-line professions, one can carry the shield guard and the heavy-armored general, while the other cannot. The difference is obvious. The shield guard's blocking rate is around 40%, and with the skill "Iron Wall", he can take down the BOSS three times, while the heavy-armored general simply piles up blood. When encountering a zombie siege level with armor-piercing, he will lay down in two rounds of skills. So if you mainly play the main line of tower defense, the shield guard is two levels more stable than the heavy armor general.
In the mid-row damage profession, the choice between archer and assassin is huge. Archers are very good at hitting fixed targets, but in tower defense, enemies move fast, and archers often miss the mark. I measured it ten times and found that the average output of the archer was 1.3 times that of the assassin, but the effective damage in actual combat was 25% lower. Assassins have displacement skills and can go around to the back row to kill mage monsters. The poisonous strategists in the late stage of tower defense are all killed by assassins. It is recommended that zero krypton players give priority to raising an assassin, which is the most cost-effective.
There are only two auxiliaries in the back row, one increases blood and the other increases attack speed. The healing amount for adding blood is fixed, 1200 per jump at level 50, which is completely insufficient to face the siege of zombies. The attack speed increase increases the attack speed of teammates by 1.5 times, and when combined with the archer, it can also trigger passive combos. In my actual combat test, by adding two archers to increase attack speed, the clearance time was shortened by 33 seconds, which is much faster than the group with treatment.
Finally, for characters in the harem development system, don't be fooled by the appearance. I compared the attributes of Diao Chan and Da Qiao. Diao Chan adds team dodge, while Da Qiao adds critical hits. In the later stage of tower defense, monsters attack more frequently, and the evasion benefits are not as stable as critical hits. In the later stage, Da Qiao can change his fate against the odds. In terms of statistics, level 50 Da Qiao increases the team's critical hit rate from 15% to 28%, doubles the critical hit damage, and cooperates with assassins to directly kill elite monsters. It is recommended to give priority to promotion to Daqiao.
To sum up, novices should choose shield guard + assassin + attack speed acceleration assist at the beginning, and raise Da Qiao in the harem. This way, the early stage clearance will be smoothest and the resource utilization rate will be the highest. I see many people recommending heavy armor generals, so I suggest you calculate the cost-effectiveness. With the same resources, raising a shield guard can resist two more waves of monsters, and the money you save on building towers to buy stamina is more cost-effective. If you have any questions, please comment and I will post a screenshot of the data.