Blood Mage build to chill in maps

Hey everyone leveling a twink BM at the moment I’m in cruel, everything is going well I’m still full minion arsonist and intend to switch build after I get to maps. My objective is chill in T15 maps and farm breaches and delirium, bosses are optional.

From what I understand there are 2 main builds: - Hexblast - Detonate Dead

I’ve saw a Fireball build on Maxroll but not sure if that is obsolete or not but that could tempt me