Most importantly: it's good on its own, without depending on other cards for much needed synergy. Just keep playing the game as you normally would and reap the rewards as you go along.
Still doesn't solve Gitrog's problem though - it depends on other cards to function optimally, hence you shouldn't bother with it. Just GSZ for Sigarda/
Carnage Tyrant (depending on what colours you run) and call it a day.
As for your last comment: Be that as it may, that does
not mean that there aren't wrong ways to play Nic Fit.