It sounds like you might enjoy Risk: Europe! It’s available for only about $30, and it features free-for-all battles across the old world of europe with a more complicated economy and army structure than classic Risk.
I don’t think the A&A 1914 board is well-suited to a random objective deck…you’d be investing a lot of time in fiddly setup, beancounting, etc. only to have someone win all of a sudden because they had an easier-than-expected objective card that they drew at random, or because you guessed wrong about what their objective card was and blocked them out of the wrong territory.
