Elevated Expanses - Challenge question

Last objective of the challenge reads "Complete maps with at least 50% Pack Size (x/15). Rolling the map with chaos only seems to go up to 45%. Scarabs with pack size did not seem to have an effect as I ran one map with influence scarab, + pack size on influence, 40% magic monster pack size and exarch influence with pack size in atlas. How are we supposed to complete the challenge?

The valdo puzzle box maps all seem to easily go over 50%. Probably your best bet in trade league.


https://www.pathofexile.com/trade/search/Necropolis/EqnpXwzc5

Ah, completely forgot about valdo maps, cheers for the help!

I did some trying around with the new T17 maps as well and it seems you can use sacrifice fragments to increase the pack size.