If you open the event tab then click the info button next to your score, it shows you everything it's possible to get

Personal I really like this DoF: Because it's a no-brainer skip. I'll ignore it completely and save my resources!

I did that and didnt see anything worth chasing.  But Plarium always hides something in plain sight so I ask to make sure.    lol

I consider DoF Events with Relic Materials low priority; however, I tend to pull all my Mortal Soulstones any time there is a 2X Soulstone Boost, especially one that also gives 2X on the 4*. That is the best return on that resource.

However, I am stingy with the Immortals. Those are fuel for Guaranteed Lego DoF Events.  

Oh the path.  Had no clue what you were talking about for a minute, lol.  Personally I always do at least a handful of points to try and snipe the primal shard.  Also with pinned rarity you have a high chance of at least 1 purple chest with minimal investment. 

Get above 7ish Eternals and then you can fire away on the Immortals too.  5*+6* on them is pretty good. 

I try to save the Eternals for their Annual 2X....or I use the coins to take a toon to 6*.

I have never used pinned rarity.  Does it matter which rarity I pin?

Purple is best, but if you pull Blue before Purple, pin Blue, and you can change if/when you pull Purple.  However, if you pull 2 Blue before pulling Purple, you may want to leave Blue pinned.

Yeah just always pin Purple.

Personally Ill dump the blues for the purple even if im at 2.  Not worth losing a purple chest imo. 

I do the same if it is a DoF I will be getting lots of points for, but not if it is one that I am gonna be slacking on. In that case, if I pin Blue first and get a second Blue, I will leave Blue pinned in case I pull the third. Starting over if I may only get a few more cards is bad odds. 

Can we only pin when the option pops up?

yes. you have to pull one before you can pin it

I always end up getting suckered into going deep on them.  Especially the pinned rarity ones. 

My DoF luck is typically atrocious, so in the absence of a Lego to chase, I only marginally engage.

This DoF is a good example. I did 11 flips and got one triple purple, and didn't get a single thing that I conside worth the effort, including the reward for the triple purple. I got the Chaos Ore, which is one of the 2 worst possible prizes, and that is at least the third time that has happened to me.