Hi All,
I'm new to playing IA skirmish, but I've been playing other table top wargames for years and I'm looking for some advice on list building.
I've always liked the look of the alliance rangers as well as the echo base troopers and wanted to include them into a list with Fenn, Luke and/Obi wan. I've got the core set and Hoth expansion as well.
Any help would be appreciated
Best way to learn is to play.
BUT there's a list builder called Tabletop Admiral.
Check out the link. There are lots of lists to look through after which you could model yours on. http://tabletopadmiral.com/imperialassault/lists/
I hope that helps. Good luck!
I think it's difficult to include everything you've mentioned and I'm not sure you'd end up with a particularly competitive list, having said that you can use most of those units into a solid list with what you have:
[12] Jedi Luke
[9] Alliance Rangers
[8] Elite Echo Base Troopers
[7] Obi Wan
[3] Gideon Argus
[1] Random upgrade, Motivation/Balance of the Force/Combat Suit/ Diplomatic Mission are all good options here but not sure which you have 
I've played Jedi Luke // 2 x eEcho Base // Obi Wan // Gideon // C3PO with some success and this isn't far different to that.
You could do this....
[9] Alliance Ranger
[9] Fenn Signis
[3] Gideon Argus
[12] Luke Skywalker (Jedi)
[7] Obi-Wan Kenobi
or trade Gideon to up the rangers to elite. Don't know how competitive that is though.
I do hope Fenn gets an errata to his points. A rebel trooper list on the current map rotation with him could be very interesting.
Thanks all, for your advice 
I've been onto the Table Top Admiral site and have had a play with putting the below list together.
Deployment:
[9] Alliance Ranger
[8] Echo Base Trooper [Elite]
[3] Gideon Argus
[12] Luke Skywalker (Jedi)
[7] Obi-Wan Kenobi
[1] Survivalist
Command:
[0] Against the Odds
[0] Celebration
[3] Covering Fire
[1] Deflection
[0] Element of Surprise
[0] Expose Weakness
[1] Marksman
[1] Marksman
[1] Negation
[0] Rally
[2] Reinforcements
[2] Reinforcements
[3] Son of Skywalker
[1] Stealth Tactics
[0] Take Initiative
Looking forward to giving it a go and will let you know how I get on
If you're looking at playing tournaments, I'd recommend dropping survivalist because there is very little exterior space. Diplomatic mission on Gideon is a good choice.
Also look at dropping expose weakness. With only the alliance Rangers I would drop reinforcements. Maybe Assassinate/grenadier/call of the vanguard (all though thay only works on the echo) and also planning
I would add grenadier to your command cards as well. Probably drop the two marksman cards and deflection. Frankly I would also drop covering fire, as it's hard to get three points worth of use out of it.
-ryanjamal