Hey, I've been on my fisherman and thought sharing a few ideas about templates might be fun. If you are ONLY doing fishing at sea then you only really need a slayer bow even without GM skill and you'll be fine, this is for the total package fisherman who does dungeon fishing, quests and pulls up his own nets. Archery is probably not the way to go for the two bosses unless you're geared to the teeth, and even then you'd use a ship with cannons instead, but everything else is doable with an archer. This is my template right now...
120 Fishing
100 Archery (80 real + 20 from Hunter's Headdress)
100 Tactics (70 real + 30 from jewels)
100 Musicianship
100 Provoke
100 Hiding
100 Resisting Spells
80 Chivalry (50 real + 30 from jewels)
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800 skill, 720 real + 80 from items
I love this template because I can handle dungeons, nets and other stuff via provoke and hiding while still doing decent damage. You may have noticed that there is no anatomy which translates into a 55% lower damage bonus to the base provided from Archery, that is intentional because, in my opinion, having cap resist and hiding provides much more utility than anatomy, especially without healing in places like Doom, and it's not always about brute force as any bard can tell you!
80 Chivalry = 100% chance that consecrate weapon does damage of the type your target is weakest to, no elemental weapon needed.
I do have anatomy on soulstone to swap out the resist if I want to do more damage to provoked targets and am not likely to take heavy casting damage or curses(doom!). The template also allows you to swap out the jewels for a set with no chivalry if you want to add more of something else, like luck. I do have a lot of high end gear on to maximize SSI, MR and other important stuff but I feel like I can go anywhere with this character and be hard to kill.
Base Stats are 100 STR, 100 Dex, 30 int with the 5 bonus. That might seem like an awfully low amount of mana/dex but as long as your armor has max mana regeneration and 10 more mana(total=40) it's not a problem, especially with high resist, hiding and provo. Note: get Stamina to 120 minimum via gear and to 150+ if you can, you can speed up the damage(SSI) with divine fury if you're not being hit too much(it lowers defense). Overall the get out of danger free card provided by having both provo and hiding with resit more than make up for not having anatomy and I find myself rarely switching anat for resist unless I'm in a group.
What does your fisherman run with?