Well I'm up to lvl 89 now ^^
An alternative to Tiger Masks is Griffon Leather, which caps at lvl 97. On my server, Griffin Hides sell for 30k each, which is *sort* of comparable to Wyvern Skins at 25k, and considering the other ingredients in Tiger masks, these synths are both about the same cost per synth.
Just make sure every synth counts, as materials are not only very expensive, but also rather rare.
One other note . . . there's alot of info out there about what days/moon phase is best for HQ or skill ups, and i've done a bit of my own research and found that, apart from full moon/lightsday . . . full moon windsday is also very good for skill up (vs. full moon/other days) Note, this is using earth crystals, wearing no + or - elements aside from the +1 dark on my guild gloves, and with earth energy in mog house. Just in case any of that affects it significantly. So, I hope that information helps you.
edit: updated original post a bit.