Suggestion

1. Won't work because these bosses don't have a fixed spawn time and the timer won't know when someone kills the boss inside the game. At the same time this is something you need to discover yourself.
2. We were already aware of it and it has been fixed, read the updates. This is more of a report rather than a suggestion considering it got bugged yesterday.
3. It can't be turned off for the offtrades and on for the rest. So far it's not being abused as you would need a lot of time to gain mupoints just by offtrading alone, even with multiple accounts and you cannot gift buffs to secondary characters while the pets have only durability and being online for days for a simple tol alone doesn't make it abusable. If it will be the case in the future, then it will be completly removed.
4. Read server informative thread if you got questions about jewel of life rates, items with luck are recommended for a higher success rate.