Playing modern format tournament is quite challenging if you don't have enough cards. Some key cards to prioritize buying to be able to compete includes Legionnaire Alvar, Deeplurker & Flying Squid.
Adding Scavo Hireling also extend the survivability of Alvar both in Magic/Range/Melee attacks.
It's so fun to watch Alvar revived with max armor.
Some of the battle using this combo:
https://splinterlands.com?p=battle&id=sm_U41J5SsJpfBpbHxOGGL0&ref=jiabazai
https://splinterlands.com?p=battle&id=sm_Sa7vKh8lLcUPlXah8FDK&ref=jiabazai
https://splinterlands.com?p=battle&id=sm_jMGlgRg8EVMjShU10PNB&ref=jiabazai
Hope you have fun using Legionnaire Alvar as a Tank! Let's continue to enjoy playing this awesome game.