List of Battles I suggest:

OvC 20 - http://www.jazz2online.com/downloads...ompetitors-20/
OLC Battle Pack 2 (x7) - http://www.jazz2online.com/downloads...c-battle-pack/
Asinine Armory - http://www.jazz2online.com/downloads...armory-collab/
Rural Mountains - http://www.jazz2online.com/downloads...ral-mountains/
Peculiar Purple Peak - http://www.jazz2online.com/downloads...r-purple-peak/
Atlantis Cathedral - http://www.jazz2online.com/downloads...tis-cathedral/
and NAV levels if they ever get finished...

And here's the CTFs I suggest:
Death Star - http://www.jazz2online.com/downloads/6902/death-star/
Heat Shrine - http://www.jazz2online.com/downloads...3-heat-shrine/
Dungeon Paradise - http://www.jazz2online.com/downloads...geon-paradise/
Dusk of Serenity - http://www.jazz2online.com/downloads...k-of-serenity/
OLC JJ1 CTF Pack 2 (x2) - http://www.jazz2online.com/downloads...tric-boogaloo/
Frontier Falls - http://www.jazz2online.com/downloads...rontier-falls/
Dead Meadow - http://www.jazz2online.com/downloads/6728/dead-meadow/
Fukushima - http://www.jazz2online.com/downloads/6717/fukushima/
Proteus - http://www.jazz2online.com/downloads/6701/proteus/
A 2-nd level CTF Pack (x2) - http://www.jazz2online.com/downloads...evel-ctf-pack/
The Pit - http://www.jazz2online.com/downloads/6671/the-pit/
Space Cheesecake - http://www.jazz2online.com/downloads...ce-cheesecake/
DarkZone - http://www.jazz2online.com/downloads/6614/
and NAV levels if they get released.

Atop of these I suggest looking at Impressions A which contains elements of both lists.