how to reroll my ice nova into a boss killer

Hello,

I'm almost at level 100, donc with most challenges and want to do challenge 39: ultimate usurpers for the first time.
So I need a boss killer that could be a little forgiving. I was thinking of ice spear totem.
Any idea that might be better?

THX

Archmage Ice nova of Frostbolts is a very good uber killer already. I would recommend swapping from doryani corrupted soul to dominus conviction of power(reduced mana cost and then one of area damage, ele damage, mana regen or ailment effect), as corrupted soul survivability is vastly less necessary with Svalinn. Furthermore you should be running intensify to begin with, with caster mastery for intensity 4 its the strongest single aoe spell support gem in the game(swap Pcoc for it, as you can sustain power charges while mapping with disciple of the forbidden and against bosses with assassins mark qual), furthermore a good profane wand will be significantly more damage than a void battery and you should invest in a bottled faith. Ideally you will be able to afford to invest in the haunted by tormented spirits enchant which is a giant pile of nice stats and occasional bits of incidental utility.

In order to run assassins mark on your arcanist brand you would need to reposition it to a four link, swap it with your arcane cloak set up, automated arcane cloak is a bad idea vs pinnacle bosses, you want it up when you need it not maximum uptime, especially since most ubers have windows where it is safe to dps and large periods where they are invulnerable or unsafe to stand still during.

If you have the budget for it I would recommend swapping over to a doryani's lesson & scintillating idea cluster and getting exposure on your gloves to let you automate another curse (conductivity in the shield, ele weakness in the helm and then arcanist has mark and two survivability curses which you primarily use against threatening rares and uniques (I would recommend enfeeble and temporal chains)).

thx a lot, that's a go for icenova uberkiller. I should have the budget for all those changes
I'll switch when I reach 100, I don't want to die and lose progress, I'm almost there
TY

I had no issues with doing that challenge on my icenova build. Last response covered a lot of very good changes, but you shouldnt even need all of the them to complete the challenge, I play as a mapper/allrounder and didnt make any bosser specific changes to complete.