Laslow is my favorite Fire Emblem character, and I've been inspired to a solo run of Conquest with him (paired up with his S rank partner my avatar of course), as soon as you recruit him in chapter 12. I have only beaten Conquest normally on normal mode, but I am willing to try hard; I refuse to do lunatic. I will give Laslow every permanent stat-boosting item I can give him, and maybe use tonics in battle if necessary.
Here are things I need to consider and could use suggestions on before I begin.
What class should Laslow be in? I'm willing to use heart, partner, and friendship seals.
What class should my avatar be in?
What should my avatar's boon and bane be?
At what level should I promote Laslow?
I appreciate the help.