ToJ --> ToF? (in General)

For someone doing a pure fireball build, is it worth converting a ToJ to a fireball tat? I assume I can't convert it back once it's done, but is it worth doing at all?

I'd consider trading instead. But it depends, are you going for pure damage or do you need some defense?

FF do pack a big punch.

I cry every time a ToJ dies.

FF. If you want to use a ToJ for a one or two minion mage character, you do not want fireball on your mage. Considering that CoC probably wouldn't work for most people with so few minions and that MM is...for lack of a better word, weak. I'd say you need to keep using FB, which means you need a FF.

you can almost buy a FF for the price it costs to ink one why not just do that and then still have your ToJ