I agree with everything said so far.
Yes to Light DME
Yes to Warrior for Bittering
Yes to watch the crystal/no dextrine
This is how I would break out your hops
1/2 oz Amarillo 1/2 oz Cascade FWH
1oz Warrior @60
Take 1oz of each of FF, Amarillo and Cascade, and break them up into 1/3 oz each to blend
1oz blend at 15, 5, and FO
1oz amarillo and 1oz cascade DH
Thats just how I would do it as an IPA, I have a similar Pale going with Cascade, Zythos and Citra.