How does Switcheroo work with Orrn Forge God with a Sterakos and GA equipped and 7 gears in total against a tentacle token?

Ornn ends at the Tentacle's Might (1), and the Tentacle ends at Ornn's full current Might — Switcheroo counts every bonus, including Ornn's +1 per friendly gear and each gear's own Might bonus (Rule 433).

Math: Ornn = 4 base + 7 (his passive, one per friendly gear) + 3 (Sterak's Gage) + 1 (Guardian Angel) + whatever the other 5 gears grant. If the other 5 grant nothing extra, that's 15. Tentacle token = 1. Switcheroo applies a fixed +14 to the Tentacle and −14 to Ornn, so Ornn = 1 and the Tentacle = 15 for the rest of the turn.

The gear stays attached to Ornn — only the Might values are adjusted. If any gear is killed or removed later that turn, Ornn's Might drops below 1 (treated as 0, Rule 143.2.b), since the swap modifier stays fixed. Guardian Angel and Sterak's keep working normally on him.