I just switched from m/w to w/m after getting my warrior high enough for all my mage gear, but still a little short of 80. I have been maxing Brute strength, Lava Weapon and Electric attack, that is it, with other points left I have been putting into, 55 in thunder sword, 55 in lightning touch and the rest into Electric rage. I only am maxing Brute strength for the mage side, if I ever feel like playing it, not for the w/m. I leveled up my wand skill to max, and my staff skill is decently high. However, after seeing the slow swing speed of my staff I quickly T10ed a magic hook and got a talisman which is all read to go when I hit 80. That way I can keep my staff ready for if I play m/w.
I would be maxing skills Electrical Attack - Electrical Rage - Lava Weapon - Lightning's Touch - Thunder Sword - Brute Strength in that order.
-Electrical Attack is your biggest damage skill
-Electrical Rage is you're bread and butter for w/m, without it you're dps is less than average (still better than a mage though xD)
-Lava Weapon, more damage once you get your 60/60.
-Lightning's Touch should be spam'ed 7-8 times between re-buffing ER (after you have got 3 stacks at the start of course), this adds a considerable amount of damage to your total.
-Thunder Sword shouldn't be used during fights as cast's interrupt white hits, but it is still a great skill for trash, pvp and those boss skills that you really should be moving away from.
-Brute Strength does gives a nice buff to HP, but it's not worth the amount of TP to max it unless you have spare.