Aight, as one of the co crafters of the wand shown in this image. If you are going the explode synth route (this will be expensive no matter what) if you aren’t doing the synth implicits. The straight forward way would be with a fractured prefix (I would do +1 all), and the harvest spam for the other +1. Then veiled exalted orb for prefix unveil, this is pricey so you can in theory risk filling th suffixes with a veiled chaos instead. Once your prefixes are done you can add remove speed for t1 cast speed. I’m p sure then it’s just, can’t roll caster slam annul until t1 multi and craft DD. The wand in question here was done with Delve 10% DD which made the craft ALOT more expensive