Just ran through Black Talon with light side Khem Val. Choices are as follows

3,3,1 3,2,1,1 3,1 2,3, (-30),2,3,3 (Capt Lives) 3,2,1,3,1,2 3,3 1 3,2,2,(-30) 3 1,1,2,2

the (-30) denotes lightside choices. Choices will change if the Capt dies or does not.

The result is +200 LS points, +285 Affection.

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3,3,1 3,2,1,1 3,1 2,3,1,2,2,2 (Capt Dies) 3,3,1,3,1,2,3 3,3 3 3,2,2,2 2 3,1,1,2,2

+200 DS points, +455 Affection.

Enjoy

I found a teeny-tiny thing: in the conversation with the Twi'lek Jedi you get 1,1 not just 1.

So this here is for light side, when the Captain lives:

3,3,1 | 3,2,1,1 | 3,1 | 2,3,2,3,3,3 | 3,2,1,3,1,2 | 3,3 | 1,1 | 3,2,2,1 | 3 | 1,1,2,2

+200 Light Side Points, +299 Khem Val affection

If somebody else kills the Captain, use this one instead:

3,3,1 | 3,2,1,1 | 3,1 | 2,3,2,2,2,3 | 3,2,1,3,1,2,3 | 3,3 | 1,1 | 3,2,2,1 | 3 | 3,2,2,2,2

+200 Light Side Points, +304 Khem Val affection

Both of these assume the General lives. There's potentially two more trees, if somebody else kills the General. I'll do them next time I'm not sick of BT, and then update this post.

3,3,1 3,2,1,1 3,1 2,3,1,2,2,2 (Capt Dies) 3,3,1,3,1,2,3 3,3 3 3,2,2,2 2 3,1,1,2,2

+200 DS points, +455 Affection.

As of September 2nd 2013, it worked like this:

331_______Welcome aboard

3211______Droid message

31________Security Blockade

231222 ___Ship Captain dies

3313123___First Officer convo

33________Brental Star com terminal

3_________Jedi Padawan

3222______The General

2_________Terminal return notification

31122_____Droid and Kilran convo

2_________Return to Fleet

Doing the killing of the captain, then logging out and back in, resetting phase before re-entering the instance allows you to do the first part several times before completing the instance. Dark side points and Khem affection points accumulate through repeated conversations.

Repeating the first part just once, this netted 300 dark side points and 472 affection with Khem

Dark Side:

6/16/2015 - Running BT on Hard Mode with Khem yields 1762 affection points (subscriber, all 3 Persuasion percs unlocked through Legacy) - proofpic

It works even if you chose you-know-who at the end of Khem's storyline.

The choices are:

33x_______Welcome aboard

32x1______Droid message

1_________Security Blockade

231233____Ship Captain dies

2x13123___First Officer convo

33________Brental Star com terminal

3_________Jedi Padawan

3322______The General

x_________Terminal return notification

31x22_____Droid and Kilran convo

*x = doesn't matter what you choose