Maybe I'm just not picking up on it but in my limited play time I haven't been able to figure out any monster weaknesses or specific spell builds.
I've seen many people post stuff that suggests that I should know this stuff though like talking about builds like a blood build or why I shouldn't be using a root spell at a certain time but to be honest I'm flying blind here.
Am I missing something that describes this stuff or is this just smart people that are passing along useful information? Up to this point I've just equipped the spells that seem the most useful with the most casts but I have no idea which elements for which monster
PSN: Nepherael /// Why did I keep going back? Because some people still appreciate common decency --> http://tinyurl.com/72s9lwv
Most of the people posting builds for certain bosses have just figured it out through trial and error. What I do when I face a new creature is bring my fav spells and just try to win, after I know the bosses moves and whatnot I bring 1 of every element spell and fight it again to find it's elemental weakness, once you know how it fights and what it's weak against you can then put together and effective build for that boss. Trial and error man, stick with it and you'll be fine.
Tethealla is correct, if you strike a normal monster with it's weakness it says vulnerability in the upper right of the screen the first time you hit it in that mission, if it's a boss it will say Archfiend weakness. Spam the weakness on the boss until you get it stunned then get some free shots in before "detonating" (this is what I call it, idk the official term) it.
Let's use the Harpy for example. Harpy is weak to fire, run up and start using fireroot tri or imp pitchfork until the harpy gets stunned (it will have fire around her, she'll stop moving and "flame hell" should pop up on the top right of the screen) hit it with blood, or anything else really, for a few seconds then detonate it with and ice spell to get "skillful strike" which will knock the harpy down for a while allowing you even more free hits. This is the basic idea when making a spell set for a boss.
Look at the built in manual, near the back is the ele wheel, to.do the skillfull attack or whatever you just do it backwards. Like frost beats heat, BUT to blow up u do hellfire stun then hit with frost. Page 31/53 in the game manual.