Of course, I disagree with few people on this thread.
You should care about 6 star gear.
Dragon 13 is HUGE!
This is your first step to getting 6 star gear.
Even if the 6 star drop rates are low, You can still get good 5 star pieces along the way.
The 6 star gear you get stage 13 can be same quality as 6 star gear I get at stage 25.
You put yourself in a strong position.
Obviously, I don't like the idea of 2 starters lvl 60 because they will be put in vault.
The starters dont last forever and get replaced by other rares, epics, or leggos.
I would look at every hero you own just to double check.
You might have over look an alternative poison hero by mistske.
If you don't have another poison hero, Than you are forced to use Kael.
Its not ideal, but you have to do what you have to do to get the job done.
Kael to lvl 60 would be your last resort option.
In other related news, FluffyPudding comment on this forum is ridiculous.
Just take what he says with a grain of salt.
The Dragon is vulnerable to poison.
Its the entire reason we are having this poison discussion.
FluffyPudding is just a beginner.
He doesnt know what he is talking about.
His Frozen Bashee, Tayrel, & Miscreated Monster are still lvl 40.
His words & his actions are what you would expect from inexperienced player.
Its fine to be a beginner - we were all beginner once.
Just don't take anything he says serious.