1.) Stats

The outcome stat of the new H card depends on how much current stats your original CARDS has.

Therefore it's always better to max out 2 of your original cards first.

- The amount of soldiers on your card does not effect your stats -
*Confirmed, tested by myself

2.) Arcana Succession

The translator sucks, the real effect of this arcana is;

"Transfer 5% of the original CARDS' current stats to the outcome H card.

5% means so much, it only cost 100 medals don't be stinky, I screwed up my Necro because of this. (510 less base attack compared to Seiya who used the arcana)

Example:

Necromancer [R]
Lv50 Currect Attack = 5100

If you used 2 maxed Necro to make a HR Necro with arcana succession, your HR Necro will inherit 5% base attack from both of the orignal cards.

5% of 5100 = 205

So 2 of 205 makes 510

3.) Accident

Not every card can get into 'accident', to check whether your cards can get into an accident or not;

Upgrade > Evolve > Choose your card > Arcana > Chose any of the following

Turnover Arcana / Strong T.O Arcana / Stability Arcana

If the message on the right hand side box said something that's not 'no effect', then you card can get into an accident while performing evolution.

I lost a strong T.O arcana because I thought my Shaman can get into an accident.

4.) Friendship Points

The new H card will come with the most FP your original card has.

5. Skill Level

Your skill level is going to get carried over. Example:

*SL = Skill Level
Lv10 SL + Lv1 SL = Lv10 SL
Lv9 SL + Lv1 SL = Lv9 SL
Lv8 SL + Lv6 SL = Lv8 SL

------- Conclusion -------

1. Check accident possibility (sometimes accidents are good, sometimes it's not)
2. Max your original cards
3. Use Arcana succession