Re: Items for Zeus...
Simple, he forgot. Finish the RoB. Anyway I don't like that build.
Sobi or RoR, tangos, claritys, branches, etc.
Finish Soul Ring.
Throw in a Point Booster or an Ultimate Orb (depending on your money) in between, before or after the Eul's.
Finish Guinsoo or Aghanim (depending on what you bought).
You can make Arcane Boots, but you won't need that much mana (Eul's+Soul Ring is more than enough). Make Travelling boots if you want, or better yet, finish the major item you didn't finished before (Aghanim or Guinsoo)
Throw in some Bracers if you feel you don't have enough HP. Or just place some stats points instead of leveling up Arc Lighting.
Possible late game items:
Scroll of Town Portal
1. Arc Lighting
2. Static Field
3. Lighting Bolt
4. Lighting Bolt
5. Lighting Bolt
6. Thundergod's Wrath
7. Lighting Bolt
8. Static Field or Stats
9. Static Field or Stats
10. Static Field or Stats
11. Thundergod's Wrath
12. Static Field or Arc or Stats
13. Static Field or Arc or Stats
14. Static Field or Arc or Stats
15. Arc or Stats
16. Thundergod's Wrath
17. Arc or Stats
18. Arc or Stats
Explanation: 1 level of Arc early for last-hits and Static abuse. Bolt is maxed first of course. Take Wrath whenever you can.
After that, you can max Static if you're doing well, or 3 levels of Stats if you're doing poorly.
If you opted for maxing Static Field, then you can take 3 levels of Stats or max Arc Lighting. If you opted for 3 levels of Stats (8-9-10), then max Static now.
Max Arc if you haven't done it yet. Maybe you will want to not level it to 4 and leave it at 3. Why? because it has A LOT of jumps at level 4 (9 at 3, 15 at 4), and it will cooldown before it actually finishes (you can't use it while it's still jumping), so you're wasting the great late game potential of Static Field.