Ooh, Cyberoid. Good choice.
Repair bit was already covered obviously, so some other tips pertinent to Cyberoid:
Wonder Rate Up lets you fill your wonder bit more quickly, which means more frequent healing even if you're just slightly scraped. Useful cartridge.
Get Broad Radar. Your class isn't "healer", it's "support". Being able to know where every bot on both teams is at all times is infinitely helpful when you relay it to your team. Also, it lets you know if your healing group is about to be attacked, giving you time to tell people to scatter/fight.
If you're playing healer primarily, you either want weapons for keeping enemies off of you while healing, or weapons for building your wonder bit without needing to get to the front lines. I recommend a negatron rifle for the latter, a bazooka for the former. Negatron is available in the shop, Bazooka is also kind of in the shop - you need to buy a Steel Rider (L-size land bot) and take it from him.