Can't be the only one that's thinking that continuously challenging the same node to get all the points gets dull really fast and can lead to exhaustion.
Would it be possible to place a drop-down that would allow one to choose the level of the respective node that is to be challenged?
Selecting the respective difficulty level will up the enemy lvl as well as the points/rewards you would normally get when repeating the challenge a second time after beating it the first time around.
Doing so will allow one to challenge what could be the final version of the node while getting all the rewards and accumulated points that beating said node would entail, enabling the user to move to the next node and do the same rather than having to play what is the culmination of 8 nodes in total to get all the points/rewards.