I had a character who was a Drow (ambidexterity) specializing in darts (ordinarily 4 thrown darts per round but double it due to ambidexterity) who always carried a couple of
potions of speed. My view was that if one such potion was imbibed, his rate of fire would increase from 8 to 16. If the second potion was taken, his rate of fire would then jump to 32. In fact, I kept this knowledge to myself until such a time that I was able to single-handedly knock off a 100-hit-point-plus black dragon! Ah, ignorant DM's can be so fun.
Anyway, was it your intention for the Drow's ambidexterity to double his number of attacks? And were potions of speed cumulative with each other to a probable infinity? I only ask because I could never find anything in the rules opposing my theories. And if a Drow lives to be 1000+, who cares about a bit of magical aging, 'ya know?
Again, humble apologies if these sorts of questions were answered in previous Q&A's. But if so, just let me know and I'll go look for them. Thank you!