On a Metric Ton of Missions

A metric ton is one thousand kilograms.

To get credit for this and related achievements, you can't just complete the mission, the mission must be successful (i.e. you earn the mission reward).

Got this achievement today, after 29 days of release. A few tips to get it asap:

1. Prioritize missions on duration;
shorter than 2 hours and check 4-6 times a day. It takes only 5 minutes each time; I did it on my notebook during breaks between college.
2. Make sure succes chance is as high as possible;
even if it means sending lv. 100 epics on lv. 90 xp missions. The counter only goes up when you succeed!
3. Have as many followers active as possible by building [building=28].
4. Build a [building=35] to get followers with [garrisonability=221] trait (bonussus stack!).
5. Avoid using followers who have profession traits as much as possible.
6. Make sure you have a diverse amount of abilities; not all abilities are equally necessary!

Not all abilities are required as much as others. I found that the following dispersion of abilities nets you best mission succes chance.

2 (or 3) of the following:

• 
  
• Group Damage
• 
  
• Wild Aggression
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• Minion Swarms
• 
  

3 (or more) of the following

• 
  
• Magic Debuff
• 
  
• Danger Zones
• 
  
• Timed Battle
• 
  
• Powerful Minion
• 
  
• Powerful Spell
• 
  
• Massive Strike
• 
  

Though you can also casually level your followers and get it eventually. It's not really worth rushing it, since there's no special reward attached.