if you will use 6,3 more often than 4,6 I would suggest the 94 as well. If you use the 6,3 not often on the small board, and a 6,3 definitely needs volume - the 103 would be better - I would suggest the 86. The 86 works great with sails from 4,2 to 5,3 and you could use a 3,7.
Out of my view the 86 covers more sizes out of your sailrange. But if you will use the 5,3 most of the days, the 94 is definitely a good choice and the gap towards the 126 would not be too big.
Hope it helps,
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