Guide to offlane abbadon. Disclaimer: may not work at 5K MMR
This is a style of abbadon that is very aggressive from very early on and transitions into quite a scary lategame carry who can take on most other cores with ease. Try to get bounty rune, then start aggression at lvl 2 with E and poison orb to run down enemy supports, using W for damage/dispel/shield as needed. Get fed, get your items and dominate the game.