1 and 4 , separately or together. Also 2 is very tempting but I am slightly scared, i'd only agree if a boost of sensory abilities will go with a boost in brain capacity to process input information received by senses. I am not tempted by IQ boosts bc humans' problem is not low IQ, ability to boost IQ should be only possible with the boost in EI or whatever you call the essence of "humanness" . Tbh my priority would be to remain human , so if any enhancements means that I may become a non-human entity , I'd pass. I think the most secure enhancement from this point of view is only 1 option.