You should go for Michelin Pilot Sporty or MRF Zapper Q. They both are pretty good and offer good traction and make for confident cornering. However, out of these MRF has longer tyre life as compared to Michelin.
Prakash Shindevia Google
I want to change rear tyre of my r15 v2.0
Which on is better..?
You can very well fit tubeless tyres on your Avenger. Just make sure you get them in stock size.
For front you can use MRF Zapper FY1 and for rear tyre for go for MRF Zapper-Y tubeless. In case you can't find tubeless version of Zapper Y then use Michelin Pilot Sporty tubeless tyres for front as well as rear.