I would not want to put sealant in my tubulars. A couple of my tubular riding friends have had very good luck running Continental Sprinters (not the Gatorskin version), going almost 2 years on a set of tires with no flats at all for one person and only one flat for the other person.
110 psi is maybe more psi than you need for clinchers or tubulars on ordinary roads. I’ve come to really enjoy the ride I get with my 25mm open tubulars on my Velocity A23 wheels running like 82psi front & 88 or 90 psi rear.