Goad - I have a priority system. If I have a WAR tank, and he/she is MT, they get the goad. Usually about halfway through trash pulls, on bosses I give it a little ways into the fight. If I have a PLD tank, Goad goes to MNK > BRD/DRG > fellow NIN. I usually pop it when boss is down to 60ish% or on trash pulls about 10 secs in if it's up.

I do announce at the start who I will be goading, and that it might be random. After a goad or two I'll ask if it's working for them, if not I'll adjust.

Mantra, well, it's only 5% but I still use it, like, a lot. AoE pulls, bosses, ST etc.