never really got to know how to support burst a fire plz if anyone could tell me i would much appreciate it

for you: slowdown, poison spell, fiery attack to pet, mess, mess
for pet (if it is not a human pet): def, def, def, normal attack, normal attack

try to make the support fire slower than the water. If the fire is faster than the water the slowdown with work on the mob you are fighting and will make the shrink miss.

When I was support bursting some fires all I made it do was Slowdown xD Nothing else. I did not even have it get a cow at first. I got them past 50 that way before I turned them into attackers a got them their GS. The important thing is as Sarin mentioned. Keep the fire slower that water. Of course if it is a low leveled fire then of course this may not even be an issue. Especially if the water is well over 100 or something.

umm 1 more question would the other people im bursting with lose exp?

Because u only get a big exp they get low :D
and because of this name for this burst is support i do suport burst for my low lvl fires but i have team so i dont need worry :)

you can also try

Mess Spell, Slowdown, Poison, Fiery Attack on first mob
then poke the second mob.
When I manual burst with my chars I prefer killing(or poking) the second mob than using some more SP to burst on it because I think the exp is still same or if there is a difference it's only a tiny difference.
And that also saves SP.

But if you are using IM remote, then you can use
Mess Spell, Fiery Attack on pet, Slowdown, Poison, Poison
it saves SP than using mess spell on last round.

Just make sure that you're slower than the water but not the same spd (like spd 0) as the fire attackers.

And also you should have your skills MAXED to get the most out of bursting.
If a fire is assist bursting, it can get as big exp as what water gets during burst. Fire Assist Burst is just like bursting an earth or a wind.

XD

I recommend Slowdown/Poison/GS Pet/Mess/Mess. I tried Slowdown/Poison/GS Pet/Poison but it didn't give me as much exp as the 1st one. The 1st one gives me only a few exp difference between my fire and water's exp.

OP

some people dont like assist fires that much, because without your damage the party gets less XP

That is why some people [like me] have their own teams to assist burst. Or they ask a friend to help them.

substitute firey to hot fire |T i get bigger exp that way

If Sp or Sp food is not a problem use this:
Slowdown 1st round
Hot Fire 2nd round
Mess 3rd round
Mess 4th round
Mess additional mobs