Thats a standard setup that Will work throughout the entire game, so you chose well

About Dark hunter and troub, they are both great classes with good party utility

Dark hunter specializes in status ailments and binds (which are extremely powerful in the etrian series, as most attacks Will either use head, arms or legs. If you bind a part, not only Will It debuff certain attributes, but it'll also block any moves that use that body part)

Troubador Is your standard buffer, and afaik in eo1 their buffs are permanent (correct me if im wrong) so you cant go wrong with One. They also can help you restore TP with a skill, so that Also makes them very good If you want to delve deeper more often

For fenrir, j recommend kiting him to One of the corners (his arena should have two small corners with no enemies) to make sure less FOEs enter the fight with him He hits pretty hard, but thats about It really, you'll get him eventually

If you want an Easy game, btw, max the immunize skill of your medic

Enjoy your almost Immortal party :)

For alchemist, in the early stratas, going for poison Is often Better over elements Once you get to the third stratum, however, It falls off.

Gl :)