Items with charges have a ilvl+mlvl of +6 to the skill level. So both life tap wands and teleport staffs are mlvl + ilvl 24 [18+6], and require someone to be clvl 18 to see them in act 3. The higher ilvl is also why they don't show up in act2
edit - corrected to clvl 18 b/c mlvl of 1 on staffs and wands and ilvl of +5 clvl from buying from vendors
Items with charges have a ilvl+mlvl of +6 to the skill level. So both life tap wands and teleport staffs are mlvl + ilvl 24 [18+6], and require someone to be clvl 18 to see them in act 3. The higher ilvl is also why they don't show up in act2
edit - corrected to clvl 18 b/c mlvl of 1 on staffs and wands and ilvl of +5 clvl from buying from vendors