You should be using a fairly low-power scope, ideally a good quality straight-tube or small objective bell design, so you can get it snuggled down as low as possible. Leverguns with big, heavy scopes lose a lot of the handiness that makes them a delight.
You have two basic options for scope mounting: scout mount (forward of the receiver), or usual top of the receiver.
For scout mounting, the XS system is all you need. Get a proper scout scope instead of trying to make a pistol scope work.
For the usual top of receiver mount, you have two choices: with iron sights or not.
If you do not want any iron sights, then anything from the classic Weaver base to the DNZ Reaper mount (base and rings in one) will work just fine.
If you want iron sights, and are OK with the standard barrel-mounted open sight, the above "Weaver to DNZ" advice holds.
If you want iron sights and want to have a receiver sight (aka aperture sight, peep sight), the best option is the Williams Ace-in-the-Hole. The XS rail will also work just fine, but it has extra length out front you aren't going to use.
IMO, the ideal setup for a scoped 1895 (regardless of barrel length) would be the Williams Ace-in-the-Hole mount with an XS white stripe front sight, and a Leupold 1-4x in Weaver extra-low rings.