Yeah I don't suggest using 1.13 yet until at least most major plugins support it. And why not 1.12.2? Having the plugin OldCombatMechanics on 1.12.2 makes it no different to 1.8.8 PvP. It'll make it just like 1.8.8 PvP. All I'm saying really is, you're missing out on so much over pvp mechanics which can easily be reverted with that plugin I mentioned above.