Originally Posted by kringley

The RNG in Calla's reissue phase 2 is seriously annoying. Phase 1 was bad but I got all 6 3 medaled. This one...well I've already pulled in 1200 sealstones in phase 2, need only 250 more and I've only 3 medaled 2 of the 6 maps (fortunately that does include the last one). Some of the bigger culprits: Pests under lock nodes (so you can't anticipate them the first time). Better yet, pests under a 2 lock node, behind a RNG node so that 2 teams need to make the right pick on the RNG node for you to have a chance of 3 medalling.
Also, RNG nodes where the two sides have pests but very different lengths to finish, so that not only do you have to get 1 squad down each side, but one has to be much faster than the other _and_ each has to go the one specific way at the RNG node, or you will not 3 medal.
It's seriously just annoying design on these maps.

Just be glad that you only need to collect Sealstones. In the original issue of the event you had to 3* the maps in order to get Calla.