Extract or all grain? If you're actually mashing, calibrate your thermometer and mash lower, say 150.
If extract, try subbing some corn sugar for extract. Also when you ramp up the temp on fermentation, give your fermentor a good shake to get the yeast into suspension, also you can take the temp up to 70+ with no worries.
Eta : missed the post two up. Try mashing lower. Also a large amount of specialty malts will increase your unfermentables.nix the carapils if you use it and add simple sugars.