Artificer gains a different level, he receives a different craft reserve; leftover points from the prior level tend not to carry over. If your details are not spent, Retain in mind that this build relies on two certain feats to work. Since feats are an optional rule in 5th edition, https://centaurdruid25702.wizzardsblog.com/28007126/helping-the-others-realize-the-advantages-of-keen-sense-dnd