About ostia pulse...

Welcome to the Q&A section, don't worry about the language problem; we understand fine.

Both options can be good, but if you have invested a lot into your armour units, you might be best to give him an armour buff and just stick to the team you've built.

You can swap his C slot out for armor march for armor emblem. For a mixed team, he will like having Ostia’s Pulse; best part is that armor march does not affect his scoring potential.

This in my idea for L!Hector team:
1) L!Hecotr -
- most of basic kit is ok
- add swap
- add better special. Ignis if you want proc every battle (better for -atk Hector), Aeather if you want special ready after combat for sustain, and better arena scoring.
- as SS you can add armored boots, close/distant def, quicken pulse (if you want proc aether first combat)

2) some super offensive unit
- prefebly with some kind of brave weapon
- as C skill - res tactic (from Canas)
- seal - def tactic
- can be flying/cavalery with reposition for adding mobility for Hector for exaple Reinhart (sword or tome), Elincia, Firesweep lance flyer (Tana, Cordelia, Shigure), Chershe (brave axe) etc
- This unit purpose is to kill squishy targets, and give def/res for other heroes. It should kill their target in 1 combo (without enemy conteratack), so it dont need buff to its defence.

3) Dancer
- it is always good to have dancer.
- as C skill is good to use Atk tactic (super usefull for offensice unit)
- If other unit use firesweep weapon it is good to equip hone spd seal

4) Last slot is flexible. It can be bonus arena unit, or just something you need in your team.
It could be bladetome user, especially if rest of your team have phisical damage. As other units give +6/+4/+6/+6 this unit get 28 additional damage.