2. I feel like in multidoting situations I loose too much time targeting the different mobs. Tab targeting seems to work half the time if they are within a certain range, but not all the time. How do people target 'fast enough'?
A good nameplates mod can be a big help for multi-dotting. I'm a fan of TidyPlates and ThreatPlates. TidyPlates is the base framework, and ThreatPlates changes the look and adds widgets.
Using the ThreatPlates "Debuff" widget you can put dot timers on the nameplates themselves, allowing you to easily survey the field and see which enemies are missing dots or have dots that are about to expire. Use the Whitelist option to ensure only your dots are visible.
Using the ThreatPlates "Custom Nameplates" function, you can adjust the visibility of nameplates for crowds of adds. By adjusting the size and transparency of those nameplates down to 60-70% of normal, you can still see the necessary details, but you can also see past them. This is especially critical late on H.Spine, where the sea of Corrupted Blood would blind you if the nameplates were all full size. Make sure to set the default Bliz UI to allow overlapping nameplates.
Whether this is useful or not probably depends a lot on your keybinds layout. In my case, I try to do all my movement and targeting with the mouse. This allows me to autorun, spin, adjust camera, and click nameplates entirely with one hand. All of my spells and actions are mapped to a 7x3 rectangle of keys on the keyboard, which is my other hand.
By keeping targeting/camera and spell casting on separate hands, multi-dotting becomes easy. While one hand is dotting your current target, your other hand can be adjusting the camera and getting ready to click the nameplate of your next target.
I should use Starsurge asap right?
I shouldn't cast an instant spell as first cast in eclipse right?
- Start Lunar Eclipse: starfire>IS>MF or Start Solar Eclipse: Wrath>IS>MF
I should refresh DOTs between eclipse or anytime they are time up?
Start fight I should cast starfire>IS>MF>SS>starfire or IS>MF>starfire>SS>starfire?
Not much to discuss since these four are the only T13 caster trinkets, and the normal versions (sometimes even the Raid Finder varieties) of the main T13 trinkets (WoU and IotCM) are better than all T12 trinkets.