I've been mashing my pale German lagers at 5.5 ph. I use 10% phosphoric on them. I suppose the hoppier ones would be ok with lactic, but if it doesn't matter and you have both...
I use Brewers Friend so I don't know martins profiles. My water for this beer will be 4.5 gallons DI in the mash with 4g CaSo4, 1g MgSo4, .25g NaCl, and 18ml 10% phosphoric. 5.5 gallons sparge with same salts but no acid needed.