Question about boss tiers?

[Dan Cai]

Hi all,just say I started the boss event at level 25 and then I levelled upto 26 does it get harder straight away or does it stick with the same health as when I started? Thanks

[Fatherllama]

You always stay in the boss tier you started in, so you're working on a tier 1 boss.

[Dan Cai]

Great thanks ill get started now