I think you are missing the point of a Redeemer: to deliver crazily cost effective TH/SS terminator into the fight from 18" away. So don't take your tactical terminator with heavy flamer.
With 6th ed, it might be worth it to take Epistolary, until then, I wouldn't take it. There are two psychic power worth taking for a SM librarian: The Avenger and Null Zone. You will rarely find an opponent where you will use them both at the same time.
Whirlwind is rubbish. Never take them. Use those points to make Predator with HB sponsons.
Vindicator should never take Siege shield. 5 points dozer blade means you are immobilized 1/36 of the time. You have to spend double that just for the 1/36 chance.
The extra points should allow you to take two Pred w/ HB, 1 Vindi with dozerblade and HK missile. Put 2 combi weapons on the tac squad sergeants. I am pretty sure the one in Drop Pod will need a fist or they will get creamed fast.
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