"That give a coasting welcome ere it comes."
There can be little doubt, I think, that 'coasting' is a noun; and I regard it as the same as 'costing by aphæresis from accosting.
"I shall forestall thee, Lord Ulysses, thou."—
Tyrwhitt's conjecture, though for 'thou,' is a happy one, and should perhaps be admitted.
"Can scarce entreat you to be odd with him."
Perhaps 'odd,' which is so unusual, should be at odds.