Do pilots ever intentionally land a monowheel glider on the main wheel and a wingtip wheel in crosswind conditions?
No.

The lever arm of that glider wing is too long and the ground contact force too hard to control. You risk a tailspin which at touchdown speed might very well include a fractured tailboom.

Glider pilots fly their crosswind approach crabbed and try to keep the wings level. After the flare the ideal landing would include a brief kick on the leeward rudder pedal to align the fuselage with the direction of movement just as the wheel touches the ground, but even a slight sideways movement at the point of contact is no problem. Wing tip contact is avoided at all cost and delayed until the glider has slowed down so the ailerons cannot keep the wings level anymore.

The only exception is when there is no safe landing feasible – say on a rocky slope in the mountains. Then the advice is to sideslip the glider into the ground, hoping that the crashing wing will absorb enough energy to let the pilot survive. But that is a single-point landing and quite different to what you have in mind.

But there is one aircraft that can take off from a two-point (actually, counting the tailwheel, it's three, but two of them are the single main wheel and a wingtip) and that is the Akaflieg München Mü-23 motorglider (picture below, source). Starting from a position 90° to the intended take-off direction and with the wingtip pointing into that direction down on the ground, the pilot opens the throttle and lets the aircraft swing around. By the time the aircraft has completed the 90° course change, the wing is level from the centrifugal force and the speed is high enough to keep it there with the ailerons.