I started playing this again for the first time since 2001; some input would be nice. From reading here I imagine my party is pretty far from ideal. I decided to use mostly canned characters. Most have just turned lvl 10.
I have a DW Sam, DW dagger thief (mine, not Myles), the canned Bishop, the canned Ranger, a sprite Wiz and Ulf the canned priest. I picked up Myles and Vi. So far my Bishop and Ranger seem largely useless!
Should I focus my thief on other skills? Are there no worthy daggers later on? Do you foresee enough troubles later on to scrap this and restart?
I'd consider getting a bloodlust sword (find it yourself, obviously) and either making your thief a sword+dagger 2w (with thieves dagger offhand), or giving the sword to your samurai (you may find it optimal to refrain from 2w for some time then as there will be time when you'll get extra attack with main only without malus from offhand weapon). Both sword and thives daggers are cursed, so you'll forfeit ranged weapon capability with their wielders.
Go exclusively alchemy and psionics on your bishop for optimal development and fastest unfucking - you won't regret not scrounging all your spell picks for the later this way too.
Use shield (don't pump the skill) + mace for your priest - don't neglect his casting, but your party is very weak at tanking so you'll want priest that can be thrown into melee, so don't neglect his physical side either, might even consider dualing him into Lord later on for heavy armors 2w maces and ability to use better ranged weapons.
Since your bishop will handle alchemy, feel free to neglect it with your ranger and focus on your ranged combat skills using your weapon of choice. You can pump melee but only if you have points you don't know what to do with.
Your samurai will need some casting if wielding bloodlust (no ranged weapon), but in either case you can consider letting the skill just grow by use (mind the inevitable suckage) abd only serve as backup.
Switch Myles to Madras in Trynton ASAP (less redundancy and making multishot crossbows for ranger - hold onto all light xbows you can find), before that Myles can give extra quests when dismissed and talked to (then you'll re-recruit him and have to reequip him).
In the end you might want to get RFS, unless you really need that extra ranged and support capabilities.