If you're in it for teh lulz take a look at www.twitch.tv/lanceypooh when he's casting(Everyday except wednesday ~2PM -5 GMT). He has somewhere over 300 magmatic's that he built in roughly two days. All wired and fed fairly easily. He plans to have somewhere around 3000 though. I'd love to see how much harder it is to do that much power with boilers.Personally, I'd hate to build, much less keep supplied, the one hundred forty four sterling engines that would be the equivalent of my solid fueled boiler.
Especially when I have four of them. The conduit costs alone of wiring up 574 engines would be prohibitive.
He might or might not play on the world you'll just have to stick around to see
I'd imagine doing combustions would be even easier with xycraft water blocks + tanks and using biofuel for HUGE energy output and they're more efficient than max boilers for several irl days.