I wonder why you even have a pure when your main is that shit.
I mean, you have a pure that almost has as much Strength XP as your main does? Come on lol.
To stay on topic, you could always go P2P and become a fully quested Turmoil Pure, don't get any Defence up until you have done all the quests for Turmoil. You will be 28 Defence, then you might as well get 30.
Then bot up or hand level your Attack and Strength. Get either 70 or 80 Attack (I suggest 80) minimum (you could even go for 99). If you get 80 Attack, get 80 Dung and get a Rapier. When leveling strength, get 99.
If you decide you will get Rapier, don't bother training your stats until you have already gotten your Dung up. The reason I say this is because Dung will give you some decent XP along the way to 80+
As for your 'main', sell it for whatever you can get. I know you said you won't sell unless you have a really good offer, but those stats are really easy to bot up in a short period of time. You will need all the GP you can get to support your turmoil pure.