Malt substitute question

I’m brewing a trillium inspired pale ale. Here is what I’m working with.

10lbs - Pale 2-Row (Malt)
0.5lbs - Rye (Malt)
0.5lbs - Triticale (Malt)
0.5lbs - White Wheat (Malt)
6g - Calcium Chloride (Brewing Salt)
1oz - Mosaic (Kettle Hops, 0 min)
4oz - Mosaic (Dry Hop)
2.5oz - Citra (Dry Hop)
2.5oz Galaxy (Dry Hop)
Yeast Nutrient (15 min)
1tsp - Irish Moss (Fining Agent)
British Ale (Yeast)