Now
To add. If u can fuse all the epics and Rhazn during the champ chase event next week for new champs, that is 1000 pts right there.
One thing I would add to this - I would agree that you should fuse him as soon as possible, however, I would not commit serious resources to this act until you're much closer to actually being able to finish it.
The reason is twofold - first, that's a lot of champs to be leveling with no actual reward until you finish, so you're using energy and champ slots on champs that do nothing.
Second, there's a non-zero chance you'll pick up the epics involved in the fusion from shards, so it's pointless to waste resources fusing them. Of the component pieces, the only one that is arguably usable outside of the fusion is Lich, and even he's extremely niche.
Also, another thing to consider, especially when it comes to fusing the component pieces, is that they count as summons - so you'll want to time the actual fusings during champ chase events/tournaments. This is also true to a lesser extent for the pieces themselves - no need to upgrade the smaller pieces to level 40 until there's an actual champ training event, and likewise same for the epic pieces to level 50.
Taking all of that into account - what I'd basically do is just stick your pieces into the training pit, and let them slowly level for free, until you're ready to do the real fusion.
@Trips Ah, thanks for the heads up. Blew most of my gems and energy on the anniversary stuff though.
@Kramaswamy.kr Sounds good, that's pretty much what I've done so far. Just have 3 fusions passively levelling in the pit, since I only get an xp boost once a week, from the weekly quest. Thanks for the info!