On the subject of weapon choice, while you get the weapon bonus benefit from 2h, DW should provide more weapon procs via Elemental Flux, which may be more worthwhile if you're rolling with something like the 44 point weapon enchant for RB.
The level 44 Enchant does say that it will heal for 35% of the damage done by critical hits, so a 2H weapon hit would heal for more because a 2H hit will do more damage than a 1H weapon hit, however....wouldn't you get more crits by using DW rather than 2H?
DW will crit more often, 2H will crit harder. In the end, assuming 2 same level weapons, the healing would be the same.
Same argument for the Rift Strike Ability 38 point ability that increases crit chance by 5% for 8 seconds after use...wouldn't you get more benefit from DW than a 2H?
Nope. DW will crit more often, but the 2H will crit harder. Net damage gain will be the same, 2.5% during that 8 sec. (melee crits are 150% right?)
2H hits harder but DW gives you more hits per minute, so do those extra hits result in more damage, does it equal them out or does DW fall behind because the 2H weapons just hit so much harder?
In these cases they are equal.
The only time the weapon really matters is with instant abilities that do "weapon damage + X"
Heres a scenario where a fast, 1 handed weapon would be ideal. Say you have an ability that has a 35% chance to activate on hit, and that ability does 50 damage, flat. It is independent of weapon damage. You would most certainly be better off with a fast 1H weapon for that ability.
edit: To add on to this, even when dual wielding it is important to look at the average damage
of weapons you are choosing. Good basic rule of thumb is to pick up slow weapons. (slow speed with same DPS = high avg damage). Like with Paragon's Dual Strike, you would increase it's damage if you used two slow one handers compared to two fast one handers. Edited, Mar 3rd 2011 2:47pm by KTurner