Here's some more EP calculating madness:
Code:
Year Toku Hammu
3560BC 40/30 10/2
3200BC 74/48 55/20
3040BC 80/56 75/28
2720BC 88/72 101/44
2000BC 114/108 119/80
From 3560 to 3200 is 9 turns. Toku put 34 EP on us during that period. That means he's put 11 EP on someone else. However, Hammu put all his 45 EP on us during that period, and the next block (until 3040BC) as well, ergo Hammu hadn't met Toku at that point (or was focusing on us instead, but I find that unlikely). Conclusion: Toku has met another AI.
However, there's more:
If you look at the EP point spreading, you'll notice that in case of rounding, the topmost AI will get the extra point. The order of the AI's is simply the playerID, which means that we should be the first on the list for the AI (I'm not 100% on this, but close).
That means that if Toku has met 1 AI in the period between 3560 and 3200, he should be spending either 5ep on us (met no-one) or 3ep (met 1 AI).
That doesn't add up: 5+5+5+3+3+3+3+3+3 = 33 and 5+5+5+5+3+3+3+3+3 = 35
So unless there's some focus going on, there's another AI.
Continuing, in the period 3200-3040, he's only spending 6EP on us spread over 4turns, that's two turns of 2EP and 2 turns of 1EP. From 3040 until 2720 it's exactly 1EP/turn. Only in the period 2720-2000 he switches: 26ep over 18 turns (16 turns of 1, 2x5? we might want to check the autosaves for that).
Then Hammu:
Until 3040 Hammu put all his EP on us. From 3040 until 2720, he put 26 EP on us (in 8 turns). That's 1 turn of 5ep, followed by 7 of 3ep, which means Hammu met Toku in 3000BC. However, I wouldn't discount the possibility that Hammu met someone else as well, as from 2720 until 2000 (18 turns), there's only 18ep put on us. Other possibility is that he put 4EP/turn on Toku (maybe the AI wants to equalize?)
I do find it hard to believe that Toku focused on us, then stopped, then refocused on us, though if the AI wants to equalize it might be possible. I find it even harder to believe that Hammu met Toku between 3560 and 3200, but didn't put any EP on him. I'd have to check the code for the EP-focus stuff of the AI to be 100% sure, but I'm pretty certain that there's room for AI contact beyond Toku.