I’ve spent couple of hours today on Andoween and dug out 105 diamonds. Also about 50 titanium. But I used amethyst tunneler hammer+shovel. I don’t bother to look for right type of biome. I dig in one direction until I hit diamond and than do strip mining on several level in area. Started on level 18, than got to 16, mined strips about 100 blocks long about 20 of them in total. This was one of successful trips. I also had couple-of-hours-of-nothing kind of trips 
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