Isn't teaching players mechanics what Guildhest is for?

Just adapt them to work similar to Hamlet Defense in 1.0 as far as the reward goes; You have a list of various actions which provide bonus EXP/Gil after completing the Guildhest, based on level.

Things like; "Players marked mobs", "Players avoided AoE", "Lancer/Pugilist took advantage of directional bonuses on their abilities", "Healer used Esuna/Leeches", etc. etc..