I would mash the lager at 149-150 for 60 to 90 mins.......the IPA 153-154 for 60 min. ....that should work for you.
Never put your mouth where you would'nt put your finger!
On tap: Apfelwein, Young's Double Choc Stout, Nut Brown, Delerium Tremens clone, Ordinary Bitter, American Pale Ale, DFH 90 min clone
Kegged: Irish Whiskey Barrel Barley Wine, ESB, Robust Porter
Fermenting: Robust Porter, Ryno' Wheat n Rye, Premium Bitter
Next up: Pliny the Elder, ESB, American Pils, Janets Brown, S&A IPA, Scottie's 80/-