Effie suggestions

So I'm planning on making a super merged effie for arena scoring purposes since she's among the easiest armored units to super-merge.

Mine currently is 5*+1 +res -spd with DC, Wary Fighter, and Goad Armor with +Res Berkut's Lance, swap, and iceberg.

I'm not sure if that's how I want to use her, however. Obviously she'll get a more expensive special like Galeforce or Aether somewhere down the road. I have a Christmas Lissa and Tharja I'm willing to give up.

I have 2 sets in mind that I think could work really well. The first one is Brave Lance+ with bold fighter and galeforce. She would be an offensive monster with this set, but she would also be a sitting duck if left alone for too long. Another would be the same as I have now but with Vengeful Fighter and Aether.

Generally, which one would be better, and by extension, what IV set should I go with?