"This night englutted! Who is not Lord Timon's?"
"Canst thou the conscience lack
To think I shall lack friends?"
As to lack conscience is to be unconscionable, and would sound here rather ironically, I think 'lack' has been suggested by the following line for have, or some other word.
"Men and men's fortunes could I as frankly use."
"And in some sort these wants of mine are crown'd."