Helm of cheap OSRS GP Neitiznot is a nice balance helm. Buy Verac's/Torag's helmet if you're looking for more defensive stats . Or a Fighter hat for offensive stats (about equal stats with the Rune full helm, but bonus points in the Stab, Slash and Crush attacks)

Guthans Plate is decent the Fighter torso has a nice Strength bonus which makes it a great option if you can't afford Bandos and I'm not sure of this but I believe torag's (and Dharok's) gives slightly better defensive statistics and is costing 650k or so, it's well worth getting imo.

Your current setup is great however I'd suggest something that doesn't degrade. Dragon Platelegs are compatible with Fighter Torso, for example. Dragon Platelegs aren't very expensive and you can get the Fighter Torso only costs a couple of hours to purchase. Or Bandos armour if you're a very wealthy player.

I'd like better stats, but I think F2P Training isn't enough for levels 70 and above. I'm asking is it worth doing soul wars to get some exp. I would like to get between 74-83 and 70 str up to 85. I'm wondering if it'll take the whole month and/or less or if this is worth the effort?

I was planning on buying one of rs2007 gold those ultimate game cards or pay using mobile(I doubt this as my mom recently paid the bill but with bad timing.) Or if I could get up to 50-80 str in a short amount of time with a basic account, that would be a great sauce, too. Do you know if anyone is able to use an ultimate gamer card to use two accounts?