When it comes to eoc weapons, they are substantially more important than your skills in determining the amount of damage you are able to do OSRS Gold. Choose either Attack or Strength to train without affecting the other.
An attack pure benefits from having the ability to use advanced weapons like godswords or chaotic maul and the Noxious scythe, and these weapons are able to hit with high accuracy and the damage that armored opponents suffer. In EOC they have access to the skills Barge and Slaughter which are vital for attacking targets that seek to escape or for the Special Attacks of AGS or Claws for the older.
A pure of strength has one viable weapon and that weapon is the lv60 Tzharrket-om, however, they can inflict significantly more damage per level of combat with normal attacks , compared to other types of pures. Although they may face issues with accuracy when fighting opponents who wear armor, they do deal more damage than attack pures when they are compared to opponents who have Lv1 defence.
The process of getting to lv60 strength requires less time than 75/80/90 attacks, thus you can begin taking PKs quicker, and mauls are extremely cheap to replace when they are lost on the day of death. Strength pures have access to the highly effective Berserk ability, but they'll require investing in several attack levels in order to make use of some of the more effective Attack capabilities in eoc and also do not have a unique attacks in Legacy.
The defense level can be totally not considered in Legacy, however in eoc the Freedom ability is essential Buy Old School RS Gold. Always keep your mage/range at half or less of the amount of your attack + strength.