sphere layer blueprint with 2696 nodes, 7934 frames, 5240 shells
total SP ≈ 19.42*radius + 80880

Note: This sphere blueprint is "illegal" in the sense that it cannot be reproduced in the vanilla game. Some nodes are packed slightly closer together than should be allowed. This was caused by a bug in a third party tool I used to make this blueprint, which bypassed some node distance checks in certain scenarios.