To The Limit requires you to equip a maximum level item in all 6 slots: head, chest, hands, feet, pet and weapon. The four clothing items do not need to match, that is, you can get the achievement with a mix of leather and mail gear.
The Summoner doesn't seem to be able to complete this Accomplishment, since it cannot equip any weapons.
Series EV requires only at least one of its weapons to be maximum level. The other can be less than maximum.