Class/Job system questions

[Anova]

First, hello and welcome to the game. It's good that you leveled up pug and lnc to unlock mnk. The additional cross-class abilities are useful, but you do not need to get them all immediately. There are certain dungeons and fights where those abilities will come in handy, and I'll explain them below.

Generally though, Marauder cross-class is best used if you are having trouble taking damage or completing solo content such as story quests. The Lancer is used much more often in party play.

Impulse Drive (LNC 8): Is a big part of your optimized skill rotation and increases your overall dps. You learn it as a prereq to monk, so it's just a matter of incorporating it in your rotation.

Invigorate (LNC 22): This is considered a milestone for a monk and it is one you should get asap. This is a skill that recovers 300TP on a 3 minute cd. It's not a big problem early on since enemies don't last very long, but you will probably see it come in handy starting from the Lv.32 dungeon, Brayflox and onwards. If you have TP-management issues, this will help you greatly.

Blood for Blood (LNC 34): Is a very useful cross-class but works best if you are in a party and are not liable to get hit. It takes some getting used to but it will greatly speed up your killing speed. While always useful, you will probably really feel the need for this skill at any dps check. You can always compensate with gear early on. Once you finish the story, you will probably want this skill to tackle the endgame content.

Bloodbath (MRD 8) and Mercy Stroke (MRD 26): are most useful for increasing your defense and self-healing. Consider getting them if you want to increase your defense or are having trouble completing solo content like story quests. You will likely not use these until endgame when dps are expected to grab some adds.

The rest of the skills are overall lackluster and not really worth putting in the cross-class menu... currently.