ji-chou day pillar

Earth on earth, with 己 reappearing inside 丑 as a Friend to the day stem. 癸 adds Indirect Wealth and 辛 adds Eating God. The 庚 that 三命通會 writes for 辛 would instead be Hurting Officer, since yin 己 produces yang metal at opposite polarity.

No seat in this half of the cycle is more contested. This site's table says Tomb. A water-earth count, run forward with no reversal for yin stems, works out to Decline, the main statement of 五行大義 says 養於丑, and that same work's seasonal earth of 丑 goes as far as 王於丑, at its peak here. The 五行大義 readings are printed and the Decline is worked out from the points the books do state, and none is treated here as the winner.

戊子 was thunder, and 三命通會 卷一 makes this its partner: 己丑火，电也, this fire is lightning. The likes repeat those of 戊子, water with spring and summer, but the closing clause is clearer: 得地而晦, on reaching the ground it goes dark.