PeelSeel2
Explorer
Give them something akin to arcane blast first. Make damage scale with level. To me, even when I played 1e or older editions, it was ridiculous to have a magic user that would resort to a crossbow. If they are going to use one anyways, make it a neat in game effect that is 'magical'. Also, if their are going to be wands with lots of charges (50 I think in 1e or 100?), you might as well hand some of those spells out as permanently learnable. One thing that never broke my 1e campaign at all was having all classes have d8 hit dice.