L2 + R2 = third cross bar

[Seraphyna]

slight problem with this, the controller already does things without pressing any triggers, d-pad(crosspad to some of you) selects things on your screen. and the buttons also do things like auto attack, jump, bring up map, back

your idea is nice but it wouldnt work unless another button was used to allow those functions

You have obviously never played Tera, thus do not know how the controller setup works just fine with the map, inv, jump, and the like.