Well that depends on your gameplay:
-It has a weak defence and direct attack overall.
-The fire is very usefull at getting some comboing other players "the fire effect make them 30% blind and its animations distract them"
-Even if you died in a fight the fire will ensure you to get a kill "Not always 70% of the time" but its one of the best ways to counter other players who have an advantage on you (Better armor - faster - invisible...)
-the flint and steel could be handy sometimes.
-Very good armor but a weak direct attack
-Tank is a kit that you need to build it and builder kit is the best option: *Making a chest with builder kit full of stone swords and pickaxes.
-If you got a good weapon "or just use the builder kit trick" tank could be very usefull in direct pvp even if the ennemy has the number advantage on you.
-Plus its very usefull in group rushing.
I also came through that choice and guess what I chose Tank.
If you are a pro then you should know that by using tank you can atleast get a 3 kills per death with that frikking wooden sword..........believe me that armor is way too OP and if you get hold of any sword that is diamond or axe of the same type you will totally #Rekt the opponent team