In attempting to pull an Olwen under the last banner I ended up getting two 5* & two 4* Lukases... so I figure I may as well optimise him since Sharena is my only good blue physical unit. I want to optimise the 5* +DEF -RES one by making him a +2 (the last Lukas is SI fodder).
I have a 5* Abel and a 5* Spring Xander I could sacrifice for a weapon (both have bad IVs). I was thinking of using Brave Lance + with Fortress Def, Renewal, Threaten Def, and Ignis/Bonfire OR Carrot Lance + with Fortress Def, Seal Def, Threaten Def, and Ignis/Bonfire. Basically I want to use him as a physical wall who can occasionally take out units when needed.
Which of these builds is better? Is there another one that would be better suited?
You have the sources to build both the offensive set and the defensive set described in this web, but you have the perfect IV for the defensive one. I personally think other units can run the Brave Lance+ even better than him (Effie, Charlotte), but not many units work as a wall as he does, so I'd go with the Carrot Lance+. But first go check his analysis to give him the optimal skills!
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes