They gave you good advice. You have probably more then one issue in front of you.
Your battery is shitty, magnetic switch on fuhattan can be tricky depends who made a clone, probably dirty too, and you are building very low knowing that you have shitty battery and non property operating mod. That all together will suck the life out of that shitty battery in no time.
I have a hard time seeing that you will enjoy a .14 build in a tube of unknown quality that is driven by a shit battery.
Some kind of regulated mod would probably serve you better.
Or you can use Ohms law to determine you build/battery combo and if you can incorporate strong points of your top end (RDA/RBA/RTA) into it, you may find something that you will like.
Personally I would not build that low on a clone tube with magnetic switch. Too much shit to go wrong, I am too old for that. I like to vape peacefully without switching the battery every 15 min.
Building on unregulated tube is like reloading ammo, it is very satisfactory but it can get complicated and frustrating if you don't know what are you getting into. Never had a Tugboat box, so can't say anything about it.