Gigachad

Hey lads, long time lurker first time poster. I was a competitive WHFB player from the world that was, and I’m interested in playing tournament level AoS in the future. I’ve done a bit of research into competitive BoK lists from 2.0 and most of the top lists seem to run Archaon. I was wondering if this is still a viable choice given the new 3.0 rules and if our slaughter priest prayer nerfs will change this? I’m currently still assembling and painting models but wanted to get some more opinions on Archaon before I made the purchase. Any advice / thoughts would be much appreciated. Cheers!