Jungle Sustain Potion or Refill

Alright so quick preface, I started playing the game at the end of December last year and quickly started jungling. Since I have no experience to league prior to season 6 I feel my opinion may be skewed. Anyways, on to the discussion, what is the best options for jungling aside from the jungle item, 3x or ? I've only gone refillable a couple times and almost always opt for 3 pots because I don't find myself all that low after the first clear and feel the better sustain first clear is better, since one some junglers I can clear all 6 camps while doing no scuttle (which leaves me at about lvl 4-5) without backing and still being pretty healthy. And for the rest of junglers I usually clear 5 camps and look to gank with about 3/4 health since 2 champions damage is usually plenty to kill the enemy laner without me being in too much risk of being bursted. I know the refillable potion is very gold efficient, but does anyone honestly need that much more sustain after first clear? and the way i do my first clear, I almost always get my jungle item on first back.