First let me say I'm a casual player. Due to work I haven't been able to play for about a year. When I do get to play, it's for about 5-10 hours a week max.
I have a lvl 33 Inv/Fire tanker. I've noticed that I'm getting to a level where my enhancements are hitting the 100% improvement mark. I mainly use Invention Enhancements since I don't play enough for anything fancy. I also like that they don't degrade so I'm not focused on upgrading, I can just play and have fun.
However, I would like to make sure that I'm getting the best bang for the buck. I've searched the forums for what and how to slot and honestly, it makes my head swim with all the numbers and percentages. I really just want to know "how many of x enhancements should I put in a power before any more additions give minimal returns?"
My questions to you (and I really appreciate any advice/help):
1. For my offensive melee powers, how many accuracy and damage enhancements should I have? I currently have 3 acc and 3 damage which gives me around 101% each. Are any more wasted?
2. Can you get much higher than 100% improvement for powers? Is there a 'magic number' to work for?
3. For powers that have only one enhancement type available, is there any reason to give it more than 3 slots?
If there are any guides available, please let me know. I'm not trying to min/max everything and I don't care for PvP so it's not a concern. I'm looking for some simple answers without a lot of number crunching. (NOTE: I'm good with numbers but I do that at work, I don't want game time to be a second job).