How close can you get to the ileocaecal valve with your anastomosis before you consider doing right hemicolectomy, and Why? this is for benign disease.
Often when considering a terminal ileal resection then it is for Crohn's disease and commonly there will be involvement up to the ileocaecal valve.
It would be useful to know what the benign disease is although I suspect I was taught the same as you that putting an anastomosis at the vavle is not an option. The exact reasons seem to be quite esoteric and not readily accessible in the literature (I have just skimmed the chapter on ileal resection for Crohn's in Keighley and Williams).
My advice would be to adopt surgical first principles particularly the vascular supply. If for Crohn's and a first resection then unless there were about 10cm obviously clear (and certainly anything less than 5cm) then I would favour a widely patent side to side anastomosis to the ascending colon just above the valve.