I saw something recently - sorry can't recall which thread, but it was either Strat or General - where someone - sorry again - used the terms AI average and 5 tech gap -- assuming I have remembered correctly and that the poster was not inventing things it would suggest that bringing the weak AIs up to scratch is the better ploy ...
"Staring at your screen in horror and disbelief when you open a saved game is one of the fun things of a succession game " - Hueij
"The Great Library must be built!"
"A short cut has to be challenging,
were it not so it would be 'the way'." - Paul Craven