Time is Money

No Demonic Grip or Obsidian Shard, how are you going to damage tanks? And in relic choices you should really include Purification Beads . I also see you double stack Book of Thoth and Warlock's Staff, I would stack Warlock's Staff first because it delays your power spike further if you get it after you start with Book of Thoth than if you started Warlock's Sash. The best time to get Book of Thoth in a double stacking build would be last item, as the stacks aren't as important by that point.

That start also doesen't have much sustain other than Meditation Cloak. Instead I recommend you start like this: Mage's Blessing, Uncommon Staff, 1 Healing Potion, 2 Mana Potion.

Then for your main build you can go Warlock's Staff, Shoes of Focus or Shoes of the Magi, Spear of Desolation, Demonic Grip or Obsidian Shard, Polynomicon, Rod of Tahuti, and pick up Purification Beads as second relic.
If facing a lot of healing on enemy team you can replace Spear of Desolation with Divine Ruin.

Your ability levelling order is also a bit puzzling, you should start with Time Rift then Stop Time to clear wave faster, then go Accelerate, as Accelerate isn't very useful at level 2.

Overall, the build could work against an enemy team of all squishy gods (No tanks) in Arena, but then again this build has double stacking which you really shouldn't be doing in Arena. If this is a build for a different game mode like Conquest, then I heavily recommend you add either Demonic Grip (better this season for Chronos) or Obsidian Shard (Worse this season since structure penetration was removed).