Classy looter + any elixer of your choice (I use thrasher) BUT take off the luck elixer - Run platinum Nuri map for glyph steel
As Trent said above, use 3x + Big Luck, or use Shamrock thrasher and run Vampire Feast - Add me (Griffinfan) I do extremely fast runs at night and my team has had some luck with dragon (4 drops in two nights)
SSC - run Onyx and Earthquake for the best drops, any level works for 25 drops but if you want 21 drops run with a lvl 22
For more ideas take a look at my Guide ------->
Here