You can reach 11 golems if you pay 40c for an amulet, but it's not necessary for t1-6 maps and i'm fine just running those endlessly.
You don't need spectres. The bot can't handle resummoning them if they die but it'll happy resummon your golems. Just less hassle.
It's not exactly the same build and gear as the video, but that'll do just fine. Basically you just need the primordial jewels and clayshapers and you're good. A tabula will do just fine for a cheap 6l chest. Rest of the gear is flexible for resistance cap.
If you die too much, try using something like cast on damage taken with immortal call and if you have another red socket free, molten shell. That helped my bot a lot.