What about also dividing the jumps in 4 levels. In this way a level 4 double jump will earn the same points as a level 1 triple jump.

Features for rising the levels
-jump preceded by steps or other skating movements (ina bauer, spread eagles...)
-difficult variation in the air (tano jumps, tuck, delayed)
-unexpected jump (without any preparation)
-difficult exit (immediately doing another element after the jump)

Other ideas for the features?