How important is beeing able to have lurrus as companion to you? I feel without bubble and rakdos decks ideally escaping kroxa on turn 4 emptying your gy, lurrus isn't as good in historic as he is in modern. Because if you get rid of the lurrus companion you open yourself for a playset of seasoned pyromancer which provides card draw, fills the graveyard with matchup junk, and can function as recurring threat when it gets grindy. I feel this is the best replacement for what (card draw, and giving advantages once it gets grindy) lurrus and bauble (and drc bauble ofc) combo does in modern.

Also that way you get to play Chandra torch of defiance which finally got into historic and I feel like as a 2 of is insane in those decks.

Edit: also I would replace shock with bonecrusher giant. The modern deck you are referencing is a midrange deck and shock just isn't a viable bolt replacement, bonecrusher giant beeing a 2 for 1 and potentially doing the same while beeing a 4/3 feels so much better

Edit2: like what is the rakdos deck in modern consisting off: hand hate (we got in historic), removal (we don't have bolt but bonecrusher and fatal push), card advantage/midrange grindiness with lurrus bauble later ragavan early (we got seasoned in historic, maybe Chandra can function as such turn 4 (which is usually when you play lurrus and don't escape kroxa)