Can someone help me train these two pets into level 60? Who will be the tank? Who will be the healer?
Kiki:

dust leaf:

I could help for a fee, but we would prefer it if you could link to their actual pages before asking us who would be the tank or healer. We need the stats before being able to confirm that.

Nephini stats:

Ny'vene stats:

Yeah, if you're planning on taking them into the Lost Grove...well, you might need max stats for that. What stage are you on?

The neph has better stats all around but better intelligence and dexterity, so I'd say Light healer for that one.
The 'vene is a bit more mediocre but with LG gear would be fine. You could go towards shadow or earth tank, while I would vouch for Shadow, Scathreoite can tell you a lot about using an earth/light/air party for the Grove.

Can I put Kiki in light and intelligence and dust leaf is health and earth?
they are set up in my stables.

Sure, what do you think would be a fair fee for levelling to 60?

Scath, I'm really sorry to bother you, but could you give Anniel the rundown on using an earth/light/air party in the LG? I don't explain tactics well, thanks!

Okay can you purchase them and train them? I will give your 1 week time.

I mean, I guess, though it's been a long time since I used sub-70 unranked earth/light/air team, so I can't say I'm in-practice using them fresh-new and unranked, outside of light (I've raised three light pets to max rank so I have more practice there.)

Earth / Light / Air
our team as example

Basically it's just a matter of getting thorncoat up as often as necessary after getting mana maxed.
I run a 1hp/2str/2agi earth because that's my own personal preference (hp being the last prof added I added, at lv70), best to fight a bit and play with the profs and figure out what works for you and for the pet you're using (tank point allocation can differ on what works best depending on pet stats)

Thorncoat decently decreases damage taken, and taunt forces enemies to attack the earth pet (which combined with thorncoat means they injure themselves attacking the pet)
(Thorncoat also negates the stun from the ent's special attack, and the crits while captains are using their Vanish ability)
Light you just need to make sure the tank is getting any healing it needs. Fairy light can do it somewhat, but it's better once you hit 65 and get restoration (at least until you get the attack ranks up and beam and fairy light can heal more)

Air is air. You hit things. Torrential blow can make the bleeding debuff stronger, so it's useful to use once you unlock it at lv65. (but the party really starts once you hit 70 and get Decimate)

Ah, if you're looking for free training, I recommend this group or this one.