Pures who have 10 to 20 Defence are pures but are considerably weaker than other pures and therefore have a very slim chance of winning PvP with any opponent. I have to point out an error about your statement above. Pures with 10 or 20 defence are not significantly weaker than 1 defense pures and in MOST aspects/perspectives they are actually stronger. For example through months of playing on an initiate pure with 85 attack 99 strength in p2p, I have found that I lose only a small fraction of the time when fighting 1 defense pures my level. This advantage is also in f2p, a rune scimitar wielded by a 1 defense pure surprisingly hits several zeroes on mithral while it is the contrary for me. I dont mean to discredit your guide in anyway though, it is very well written and deserves praise.