You mean the boots on top of the tower with the static clouds around the coast from the Winnebago? You don't have to do anything else - just teleport yourself up there.
If you mean the gloves behind the blue barrier (in another tower after the maze) then I don't see where teleport come into it - you need to remove the barrier and then have enough strength to get them.
To remove the barrier you need to
have removed your collar, learned bless and have a source point, or alternatively have completed Windermere's quest and he'll come help you
Can't think the other pieces are in towers at all - if you are still stuck say which is the "last piece" you are after.