Tuesday, 29th July 2014, 05:38 by and into
I generally wouldn't plan to go one-handed weapon + shield on a MiBe. Of course if you get a really great eveningstar or demon <foo> or whatever, then sure. But even with Trog you can't guarantee you will get that, at least, not on a short time line. Just keep using the best weapon you have at any given point, if that is a one-handed weapon and a shield is available, use them both. For a MiBe, I'd probably not put more than 8 or so skill levels into shields, at most, unless I already had a very solid one-handed weapon.
Anyway, to answer your main question OP, it really depends on what you want to do with the character. If you like how ranged combat works in Crawl and you want to be able to dish out good damage at range constantly, then sure use a longbow. Trog will eventually give you a good one and will give you ammo for it as well. But if you don't like ranged combat but you still want to be able to do some stuff at range, then get some evocations. With MiBe your skills are very focused and you have extremely good aptitudes, so you can even do both eventually if you really wanted to. Just don't stretch yourself too thin early on, and don't neglect your core skills (fighting, armour, dodging, weapon).