How about wine? I don't think beer has been implemented. Someone should send a scout with 2 bags of wine.
More seriously:
Marveni is away for the weekend. I'm not sure if he saw your proposal before he left or not.
That's impressive income from the Nexus. In a game this size, even one turn with it up is almost a game winner, since you can just recast it if it gets taken down. And I almost cast it myself when Lanka attacked me, but wanted to wait for more pearls to throw into it...
I could take it down this turn, but I'd have to alchemize pretty much everything to do it. And you'd just throw it up again with more gems behind it. Waiting for contributions from anyone else would just let you rake in more gems.
275 gems in Sea of Ice? That's frustrating. I tried to Dispel it with 250 and a S9 caster, then gave up because I couldn't afford failing again. If I'd used a few more or gotten lucky it could have been a very different war.
Maelstrom was at or near the base cost. Putting too much into the gem gens just delays the pay off time. I figured if it stayed up for 3-4 turns it would pay off.
For future reference though: bonus sites don't count towards the strength of globals. You could put up the Nexus with 75 gems, but if you used 200 you'd still only have 50 extra gems.