Half Flush is easy enough, Hold winds and dragons, Pon all that shit and concentrate on whichever suit you have the most of. A Half Flush can be just 1 set of non Honors if need be.
And you can't have worse luck then me going for 1 All SImples to finish tonight. Took me 12 damn rounds, 7 rounds in Tenpai and someone else winning. 2 Rounds still working to Tenpai, and 2 rounds with more then 7+ Honors/Terminals in my starting hand so I said fuck it before finely getting 1 win.
Edit - Oh and play 3 player as it removes 2-8 of Man so forcing a Flush is even easier