What is best for titan tickets

[Monke King]

^
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[Stefix5000]

3v3, Silent Waters, Special Mission 3, Insane.

if you can't do insane, hard is the next best thing.

[Monke King]

I can’t do it hard

[Affy017]

Overlord den side mission 1. 8-9-10 tickets based on difficulty. 

it's the same amount of tickets as OD side mission 2, but it have a smaller map. less walking around means faster to farm. 

it's heat mechs for enemies.