All of my (probably extensive) comments are in the Salamanders thread.
In essence the Redemer is a heavy close support tank and the crusader a heavy assault tank. The transport capacity means it there is ever a choice I can't imagine a list with both would ever go for the redeemer. As I hope I put some bat reps up with it in it you can see how bloody hard it is to use. Really in an expensive army like the sallies its not my first choice. The fundemental sticking point with it is its got crap 15cm main guns and in a way everything else is an attempt to compensate for that. Its not even fast like the Predator Incinerator.

The IC assault thing has never bothered me, its a normal hit and not meant to be an amasing special power on anything thats got it.

Edit - as I slowly catch up to where I left off I note that BL mentioned something about a 40k ability to make the guns combine and shoot 30cm? That would be interesting. I'll probably be in Salamander mode come Sunday and if BL gets this vassel thing running could play it against him (yes, the two salamander nuts actually get to play each other!). Can have a look at this idea then.
Yep, found it
In the current WD there is anew Apocalypse Datasheet: Hellstorm Strike Force.
Consists of 3 Land Raider Redeemer.
Aslong as there are 2 operable Flamestorm Cannons in the formation it uses the Hellfore template wich canbe placed at 18". Strength of the attack is 4+ the number of operable Flamestorm Cannons.

Well the interesting but is that two Flamestorm Cannons can combine to form the bigger flame template which has a range of 18".

So what about changing the Redeemers profile that he has insteasd of 2 Hellstorm Cannons with 15cm AP3+ he has one Twin Hellstorm Cannons 30cm AP3+?
Remember that the Hellhound has a similar short range in WH40k but still fires 30cm in Epic.

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Well all my moans about the redeemer are in the salamander threads. In essence 15cm main weapons I think are a wonderful idea
Still in the sallie list it is at least balanced (or was as of last playtests) though I had to hypnotise myself to take it (and I believe get challenged by various players).
BL's idea is interesting though, and even though it means testing it all over again I can't deny a 30cm shot strikes me as a damn site better than the 15cm affair and as a bonus removes my small worries about landing craft landing with them and flaming people.

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If using E-Bay use this link to support Tac Com!
'Abolish red trousers?! Never! Red trousers are France!' – Eugene Etienne, War Minister, 1913
"Gentlemen, we may not make history tomorrow, but we shall certainly change the geography."
General Plumer, 191x